Very well thought out post, so credit to you there. To be honest though, I'm not convinced we can use the Attitude Era as a model going forward as times have changed. Of course profitability is an important consideration in each of these points but I'll respond to each of your points in turn in ways that I think would be consistent with the current product.
1) I agree that there should be no more than 12 PPVs a year. I agree that they could do away with some gimmick PPVs like Hell in a Cell and Tables, Ladders and Chairs as it would be more interesting to have HIAC or TLC as a surprise stipulation at the other PPVs as necessitated by the booking of the feuds. No Way Out would essentially be the same as Elimination Chamber though, so there is not much merit in changing the name just for the sake of it. Other 'gimmick' PPVs such as the Royal Rumble and King of the Ring also have their place - RR is obviously a mainstay, but it's nice to see you giving some importance to KOTR as well. Smackdown vs Raw tag team match can easily be incorporated into Survivor Series, so Bragging Rights can be done away with as you have suggested.
2) I think this could be great. Some last minute advertisement before the PPV would indeed have a positive effect on buyrates, but also it would enable those who narrowly missed out on the card to have somewhat of a spotlight on them.
3) I'm not so sure about this one. Given the size of the roster, we need more people in the main event. Unifying the championships could at an instant cut down the number of main-eventers by half. I do feel though that the titles could be unified for a short period of time if it were done in a way that would really enhance the storyline or help create the further the career of the biggest face or heel of the future.
4) Completely agree with you here. The IC and US titles have almost become an afterthought. At the moment neither the IC Champion or the US Champion seem to have a solid feud, and title defences have been rather infrequent. To some extent if the mid-card titles were built up more strongly then that could provide a rationale to unify the world titles, but I'd definitely wait to see how the former has progressed before implementing the latter.
5) In some respects this is the easiest thing to do. But I am still bewildered at how far the WWE has allowed the Tag Team division to fall. Santino/Kozlov and Slater/Gabriel are a far cry from the Hardyz, Dudleyz, E&C, DX and the Brothers of Destruction. I'm all for specialist tag teams, but we need people with charisma that can tell a story in the ring for that division. If that requires teaming up 2 singles competitors, then so be it. I don't really see why the WWE have neglected the division, especially with all the history it has.
6) Agree with you in principle, but not in all of your choices. Kozlov, Otunga, Young, Tarver, Tamina, Rosa etc can go. Hornswoggle needs to go, but he won't. Yoshi Tatsu on the other hand needs to be given a push, but that may not be forthcoming. With FCW, I feel they need to make better judgement calls. Sheamus, Barrett, McIntyre etc were excellent call-ups. On the other hand I don't think Mason Ryan is quite ready yet. On the other hand, Seth Rollins and Trent Baretta are good to go. Cottonwood et al still deserve to remain in FCW.
7) In one word, yes! Barrett for instance could have been a real star in the making had WWE not dropped the ball with him at TLC and subsequent to that. For someone new on the WWE roster, he had the size, look, superb mic skills and passable in-ring abilities to become the #1 heel and feud with the two biggest faces of the company, so why kill all his momentum? Sheamus is another case in point. He went from even higher heights as a two-time WWE Champion and has fallen further, now jobbing to Mark Henry, despite being the reigning King of the Ring. I'm not the biggest fan of Del Rio, but I hope his push at least materialises to something. Also, with the way they are hyping up Sin Cara, that feel that guy is in for a big debut too. But it's sad that we'll never have another Kane-like debut again as the WWE are too cautious with TNA or even UFC beckoning for disillusioned performers.
8) Like most reality TV series, the initial concept is great but the novelty quickly wears off. I consider Season 1 to be quite successful even if WWE didn't have the confidence to give the original Nexus the victory at Summerslam and even had Cena subsequently destroying them single-handedly. Season 1 was the making of the future #1 heel in Wade Barrett and exposed us to one of the best technical wrestlers in Daniel Bryan. Gabriel also has a lot of potential and even Slater is not bad as half of a credible tag team. Season 2 would have been good if they actually gave Kaval a decent programme. What they do with Alex Riley now remains to be seen as he is at a bit of a crossroads now. Season 3 onwards has been distinctly uninteresting, though something good may come of Brodus Clay.
9) I for one don't think it is needed and rather it may be counter-productive. If the mid-card titles are bolstered in prestige, a Cruiserweight division is somewhat superfluous. I'd rather see high-flying stars like Morrison and Kingston get a shot at the main event once in a while. Of course you still have others like Sin Cara, Bourne, Gabriel, Chavo, Primo and Baretta but you don't need to revive an old belt to showcase their talent. Some view the cruiserweight as the glass ceiling for performer of that size. Personally I think that if Rey Mysterio could become Heavyweight Champion, then why not Sin Cara?
10) Spoke my mind here. I guess this ties in with point #1 as most of the reasoning behind this is covered there. While I don't think they should unify the World Championships, I do think one MITB briefcase is sufficient. It would help the winner gain recognition on both Raw and Smackdown if they could potentially cash it in anywhere at any time. MITB ladder matches are usually highly entertaining (not least because of the type of athletes they normally put in there) so I think it should become a mainstay of Wrestlemania. A separate PPV over-exposes the gimmick, I feel.