I know this is going to come as a shock to you guys, but yeah different writers write characters differently in comic books.
I don't read Hulk books but just because the Hulk punches out The Sentry am I to take it that the Sentry is any less powerful? The Hulk punched out the fucking Watcher last year! You're being far too literal about this stuff.
Furthermore, you're basically bitching because the Sentry has been a bad character AND that a writer is trying to fix him and make him into an interesting character. The Sentry was a dumb idea executed dumbly, but in Siege #2, wow, he actually did something that mattered and was fun. So he's a villain now. Oh wait, so I can ignore all that dumb shit both you and I hated in previous issues? That's not desperate; that's good writing.