Alternate Advancement: Good or Bad?

[Omnimorph]

Skill trees in diablo 2 i thought were fantastic. I understand that given there were only like 7 classes you had different branches of them, but this meant it was possible to have 2 different sorcerers or w/e useful for completely different things.

AA's became quite ridiculous with time, a new expansion meant a stupid amount of aa's necessary to grind. And it was a grind too. Some were fun, self stasis, BDB etc (chanter aa's) but grinding 5aa's to get +1 mana regen when i'm already regenning 150 mana a tick already? that's just pointless.