Get rid of the Power Attack and Strength prerequisite, add 6 BAB as a prerequisite.
Cleave is awesome in v6. We don't have a lot of cool feats to take that aren't just for saves.
Requiring 6 BAB means that most characters can take this at 9 if they want but it's competing with other choice options at that level. Most martials will have the opportunity to take it at some point if they're willing to invest the feats.
I just like the idea of having more feat choices. Cleave seems like a neat choice to make, but it's way too hard to get unless you're a Fighter right now.
6 bab seems a little extreme considering g cleave requires 4 bab.
That being said, I think I'd just be pro having it be 13 str, no PA. So Fencers can't get cleave + the aoe dmg thing, but even if they could, I dunno... It'd just be a PvE pick for the most part anyways.
As a cleave addict, i approve of easier access cleave
Keeping the 13 strength but removing the power attack requirement would be neat.
I'd suggest similar for divine shield and divine power as well. Paladins and clerics are feat starved enough as it is without having to take a useless feat (power attack) to access an iconic class feature.
Great cleave should retain power attack as a requirement if anything is changed
I think PA should be removed for all things mentioned as a requirement.