Is there really much merit in a reaction that basically amounts to "two wrongs makes a right"? There were dump stats in 3.5e. But does that mean that compounding it further in 4e is okay? Personally, I wanted to see 4e improve upon the previous edition's shortcomings, not exaggerate them.
Your MU/wizard never had use for anything but Int, Dex, & Con. Now he'll just want Int and Con. Your fighter wanted Str, Dex, & Con. Now he may not even want the Con that much.
So, from what we've seen so far, 4e is presenting three issues with ability scores:
1) Little or no general utility for some ability scores, resulting in ability scores being pretty much prescribed by class-specific needs.
2) Being able to get by with marginalizing an ability score that, intuitively, should be useful for a given class (Con for a warrior, Int for a rogue).