Basically, 4E is one big open playtest. Didn't get enough before it was released, well its gotten tons now. People point that out as best practice for PF or the new goodmen game, but we are the pioneers. Of course we pay for the privilege.
Not sure how accurate this is. Pretty much every edition - indeed, every RPG - I've played has merited similar levels of errata. They just don't usually get it, and players have to deal with the problems left behind. I can understand not wanting to keep up with the tweaking of powers throughout the edition, but I'm not sure if it points to flawed initial design... or simply the inevitability that imperfect products will always slip through the cracks.
That said, for those who don't want to deal with it... it's definitely possible to ignore it. Or just accept it when you notice it, but don't go out of your way to keep up with it. If you don't use the CB, it won't come up in your game unless you want it to. If you do, the CB provides the new version for you directly. Find whatever approach works best for you - the vast majority of updates are minor updates to feats/powers/etc, and relatively easy to do without if desired.