The brandsplit is whats best. Without it guys like Styles,Owens and Bray would never have won the title. It allows for guys to get built up on opposite brands and later have matches against eachother. Corbin vs Strowman. Reigns vs Nakamura. Without a brandpslit those matches would of happend a thousand times already
If those guys wouldn't have won the WWE Title, then maybe they shouldn't have held the title in the first place? Using this logic, why not create a World Championship for everybody in the company. The World Title should be placed on your biggest star or the guy who is going to put your biggest star over. I don't want to see any
of those matches you listed, because I don't care about those guys, because the WWE has done their best to make me not care about them by pushing them either too hard, too fast, too strong or in a weird way that covers up their charm. For some reason, people have this idea that more in wrestling is better. More title reigns, more champions, more guys on the roster. If you go back and see how the WWF turned around in 1998 -- it's basically Steve Austin with Vince McMahon, Mankind, The Undertaker and Kane as a supporting cast and The Rock as a shining gem in the mid-card. That is literally all you need to set things up for your hottest period of all-time. You don't need to burn Reigns vs. Nakamura right away, because you'd have a whole bunch of mid-carders to throw at them and keep them interesting until you make money off them finally fighting each other -- if those were the two guys you wanted to run with.
Which champions matter in the WWE? Brock Lesnar matters. The Hardys, maybe? That's it. That's how many champions you need.
To answer the question, I actually think it might be mercifully over if things aren't looking good for that contract renewal with the USA Network, and they just end this experiment to boost RAW back up again -- because the answer will be Cena, Vince and legends -- like it always is. I imagine Vince returning, saying that it is time for one of his children to take control over the WWE, so it will be a Free For All between the brands, and at [WWE Big Fight or something stupid] all the championships will be unified and his son will fight his son-in-law for control of the company. Hell, it really wouldn't surprise
me if it happened soon.
Man, imagine if the WWE just announced SummerSlam as the end to this noise. You could have the following card:
Undisputed WWE Championship
Brock Lesnar vs. John Cena (he wins the WWE Title on a SmackDown return after Money in the Bank)
Street Fight for Control of WWE
Triple H vs. Shane McMahon
Undisputed Women's Championship
Alexa Bliss (w/ Ric Flair, designed to torture Charlotte) vs. Charlotte Flair
Six-Man Tag Team Match
Bray Wyatt, Samoa Joe & Braun Strowman vs. The Shield (who reform out of necessity to fight their aligned enemies)
The Rock Segment
Jinder Mahal comes out with Rusev and The Singh Brothers and claims that Bollywood is better than Hollywod. The Rock points out that he is outnumbered and needs some American partners. Kurt Angle, Hulk Hogan and Stone Cold Steve Austin make their way out and beat up the heels and then Daniel Bryan leads everybody in a "YES!" chant.
Ladder Match for the Undisputed Tag Team Championship
The Hardy Boyz vs. Sheamus & Cesaro vs. The New Day vs. The Usos (two teams from RAW and two teams from SmackDown)
Intercontinental Championship/United States Championship Unification Match
The Miz vs. AJ Styles
Kevin Owens vs. Shinsuke Nakamura
WWE UK Championship
Pete Dunne (c) vs. Tyler Bate (hey, their matches have been working)
Austin Aries (c) vs. Finn Balor
Mildred Burke Memorial Battle Royal
Seems like a weird inclusion, but since it is your prerogative to push female talent, this could be a good way to showcase a whole bunch of your women, and put someone in the position to move forward strongly to challenge Charlotte coming out of the PPV. This would be a great way to debut Asuka.
Kickoff Tag Team Match
Enzo Amore & Big Cass vs. The Revival
All that would add up to a really enjoyable PPV experience, with some finality, some focus, and everything existing for a reason. Man, it could be so, so good.