AAs are bad simply because they are permanent and cumalitive. It creates a level grind that never goes away. There are numerous ways to not have this problem:
- Make all AAs fluff like appearance options and your personal house or whatever. Useless in combat.
- Have a limited number of AA allowed active at a time. AA slots would just be similar to gear slots; grind AAs and fill the slot. Vets would have swappable options, new or casuals would probably just try to fill 1 set.
- Make them temporary. This was added with glyphs. It could also be done by having them gradually lost with higher leveling, similar to what was done with focus effects.
- Have tiers of AA that do not stack. For example, if you get +3 mana regen from luclin aas, then hypothetically pop era had +5, it would override it once greater rather than resulting in +8. A new player could just go straight for the newest AA set to catch up, or maybe one close to it, rather than needing to do a dozen expansion's worth of cumalitive work that all stacks. Likewise, a returning player would still have value from old AAs and can work to upgrade.