Alternate Advancement: Good or Bad?

[Ethanblack]

Now, apologies for playing another dumbass card so soon, but I was wondering about AAs.
I'm pretty sure that AAs didn't appear till Luclin or PoP, but I'm wondering what the community stance is on them.

I like to think that AA's can be very useful for helping to define a character's role (They help an SK make a more defined choice between tanking or DPS, for example).

On the flip-side, they can do a lot of damage to classes and really imbalance things (see the state of AAs on EQ live).

What do you think about AAs, and woudl you like to see some basic ones appear?

And, to any Devs that pass by; Would you ever consider adding some AAs?
If no, why not? (other than 'It's not in Classic/Kunark/Vellious' ;P)