The ROH name draws more new fans than anyone on the actual roster. People who watch ROH for the first time generally do so because they've heard people say it's the best wrestling company in the world. For the tag belts to be on the worst team in the company does not make ROH look like the best wrestling company in the world.
They're going to stop drawing when people start to realize they suck, which, if it hasn't happened already, will soon. And they're risking alienating their current fanbase too.
ROH sells a product. If they want people to keep buying their product, they need to focus on what makes the product good, or at least what (not who) the fans want to see. I don't like Eddie Edwards, but he is massively over and lots of people like his matches, so I'm not going to complain that he's in the company. I'll complain about how he can't wrestle the role he's cast in, but I won't complain when ROH signs him to a contract because he's hot right now and even though I don't like him, he's making the company money and will for the foreseeable future.
WGTT on the other hand get less of a reaction every time out, and more and more people start to dislike them with every match they have. If they keep wrestling like they've been wrestling, it's only a matter of time before they get go-away heat.
I totally agree with the idea of not baiting and switching people but you need to understand that the opinion that WGTT haven't added anything to ROH is only held by an extremely small minority of people. It's mostly a meme that's sprung up around you, on this one forum. Much like the anti-Davey schtick.
If you're in touch with ROH's wider internet presence, have seen the majority of ROH-related comments in the non-ROH sections of forums or are aware of the buyrates that WGTT have brought in, you'll know that no-one has a problem with them. Far from it. They're the most talked about act in Ring of Honor.
As far as the drawing goes...
GBHIX is the best selling DVD in the history of the current online shop. This just happens to be the one DVD, that features WGTT, that's been available for longer than any others. It's a shit show, that's main USP is the WGTT debut and the quality of that match.
9AS and HTCS drew surprisingly high buyrates. Those shows were main evented by WGTT. They're also, apparently, amongst the fastest-selling DVD releases in ROH history.
The lengths that you'll go to, to oversell your dislike of someone/something (i.e. "worst team in the company") aren't doing you any favours. Acting as though WGTT need to spend time training under such well-rounded, seasoned veterans as Cole & O'Reilly is obviously some kind of joke, on your part. No-one could truly believe that.
Regardless, your opinion of an act isn't relevant to ROH's business. Making out as though it is, makes you seem much less intelligent than you actually are. If you're going to question business practice, you have to put personal bias aside. There's absolutely no question that WGTT should be contracted to ROH, it's not even remotely debatable. The numbers don't lie. Contracting them is, in no way, a "bad move" and I think you know that.