Quote Originally Posted by bobbryan2 View Post
BAB increases aren't giving extra attacks per round to... ANYONE. TWF feats are merely keeping DPS in line with what they should be and preventing you from losing DPS.
The most blatant problem is a supposedly-beneficial quantity having a negative effect: increased BAB reducing your DPS. For 1wf and thf combat there is only a minor negative, where longer attack animations might have a few percentage less attacks per second. (In that case, the reduced rate is almost compensated for by the increased chance to hit AC)

It only becomes a major problem when TWF is involved, because it's TWF characters who can lose real DPS when their BAB increases to a new animation. That's because they need higher TWF feats just to stay in place, instead of to improve. Currently that only happens when a TWF guy goes from BAB 9 to 10, but if it also happens at 19 to 20 then that's a major new failure.

Quote Originally Posted by bobbryan2 View Post
Is it really so out of line to give a TWF that actually DOES give an extra attack? Especially to a prestige class that is centered around being a whirling tempest of steel?
Uh, they already DO have an equivalent to that. +10% melee speed means they get extra attacks. If the tier1 Tempest bonus had been less than 10%, then it might be OK to give them a big bonus at tier 3.