My impression is that Busiek's Avengers is basically old-school Avengers done today (or ten years ago, actually). Nostalgia with a paint job.

And it's fine if you want more old-school Avengers. I just burned out on old-school Avengers around 1980 or so...

I did love Avengers Forever, however. That appealed greatly to the 60s-70s Marvel geek in me.

Ah, Kang! He's a conqueror! He's blue! He's a time-traveler! His name is "Kang"! What more could you want in a villain?
Medieval Guy, a.k.a. Rob Helmerichs
Keeper of the Trade Paperback List