It is D&D, though. It would have to lose all of that, besides just the title obviously, which makes it D&D and then maybe not so many would have liked it.
4th Edition has never been a failure in the market, objectively. It may have fallen short of where Wizards hoped it would go in that regard, but it was a commercial success for a product in its genre.
That is a pretty fair statement. Many players have played thieves, of any race, in a disruptive manner and explained it with they were role-playing or in-character. The DM can rein it in, and in some groups it will come to blows. I don't think there is anything inherently disruptive or...