Parker and Boxing are on the right track...
The people that matter at Mythic are going to take their carload of cash and go home. Warhammer Online will suffer as a result. When Mythic doesn't make their revenue targets, EA will go in and gut the rest of the place.
It's not that Mythic has gone to the dark side and for that reason you shouldn't buy their games. It's just that this buyout is likely to ruin any chance that War had of being good.... But WoW might have already seen to that -- DAoC became a ghost town when Wow came out, and Mythic probably need a monetary backer to finish War.
Now I'm sure EA has tried to tie some key people to stay with the company for a certain period, but these folks aren't going to be working late nights when their McMansions need furnishing.
Victory needs no explanation; defeat allows none.