Except that's exactly what you(Blizzard) have told us recently.
That you took a number of people that worked on WoW and have moved them on to Titan.
So really, yes, that does happen.
That wasn't at all the context of the post to which I was responded. That player was suggesting that a singular art team directs their attention away from WoW to work on art for our other games. That's not true.
Now, if an individual person does move onto a new project, their position is filled. Therefore, the resources are still there (which is why I said "in the sense you're suggesting"). This is how career advancement works at any company. How else do you account for a company's growth? You bring in new talent (or move them up from within the company) and train them under the current folks so they can eventually fill the vacancy.
This talk about losing WoW developers, or that WoW is left to a "B team" is getting tiresome. There is no finite pool of talent and we have every intention of making sure WoW development remains very strong.
All of this is practically besides the point anyway. All you've been told is some talented people who helped build WoW into what it is today have moved over to another project to help bring it to fruition. You don't know who those people are, what positions they held on the WoW team, or how many of them have moved onto other projects. Most of them, in fact, are programmers working to develop the systems and tech for a new project. And the programmers WoW has now are amazing. They've taken the original systems and improved upon them many times over.
Just as an example, think back to how slowly UI improvements would be implemented in vanilla and TBC. Now there are scores of great UI improvements nearly every patch. That team is incredible and very experienced. Just the same, the class design team has hardly changed in years, save for a couple of additions (read: not subtractions).
Every department at Blizzard has expanded immensely over the years to accommodate the growing playerbase, as well as our ambitions for the future of the company. You can look at our job opportunities page just to get an example for the talent search we have constantly going on.
Bringing in new talent and growing the company from within is far from a bad thing. It's a great thing and has allowed us to develop several projects simultaneously without short-changing any of them. Anyone who says otherwise is working on an incredible amount of speculation and assumptions.
And even still, the WoW development leadership remains largely unchanged. Every time I stop by to chat with these people -- the same people I've been interacting with for years now -- I'm inspired by their creativity, their talent, and their dedication to making this game mega-awesomesauce. ;)
The point is, this expansion in particular, has a lot of problems, the designs have less quality (i'm not talking about art here, just designs, map distribution beign an example), the roles are not even near in challenge (more challenge to healers, almost no extra challenge to dps), problems that were greatly reported on ptr, yet they were not looked up till on live (because lets face it, it they were looked up, anyone that have looked them up would realised the problem).
Now, the only reasonable explanation for this dump in quality for the general public is that developers were moved out to another project.
So, ok, that's not the problem you say to us, ok, then you should look after for the source of the problem.