"I have yet to hear of anyone who has WA5 who is disappointed in the AA. "
Go read the SK boards, you'll find hundreds 8-)
The problem with WA is that because of the way procs work it actually reduces the number of procs we get from our self-buffs, which are generally superior to our weapon procs.
Not that many that have WA would be singing it, but I'd imagine it would also reduce the number of procs from Katta's Song of Sword Dancing too.
Basically, only one proc can fire on any given weapon swing, and the order they're checked is:-
1) Weapon proc
2) Augment proc
3) Self-buff proc (eg Katta's, or one of several SK self-buffs)
WA doesn't increase the rate of self-buff procs, and so the combination of having WA5 and an augment proc means a much higher likelyhood of one of those 'blocking' the self-buff proc.
One of the main things SKs are asking for atm is that either WA increases the number of self-buff procs as well, or the checking order is changed so self-buffs are checked first. Obviously it would be nicest if more than one proc could go off at once, but they say that's impossible due to the way procs are coded, which implies to me they have coders that don't know how to change things 8-)
Katawarl