WMHB is a very crunchy book, so I just want to make sure I got it all right.
Rondelero Flexibility (p. 7): This is a pretty pointless ability (on it's own, but see Shield Catch) - right?
Illusive Gnome Style is completely terrible, right?
Overwatch Style: Your initiative is set every time you use one of the readied attacks, right?
Startoss Shower: It's the initial attack, plus (1 + 1/5*BAB) ricochets, right?
Ascetic Style. Oh boy, here we go. "apply the effect of feats" that have IUS as a prerequisite. That means I can get my Panther/Snake/Crane counterattacks off with a weapon (once I can have multiple styles active), right?
..."As well as effects that augment an unarmed strike". Huh. I'm gonna cheat and peek ahead, and well, certain class abilities that would augment unarmed strikes, most notably monk-like damage progresion, are part of later feats. The only way that makes sense is if the Style feat is supposed to read "effects of feats that...as well as effects OF FEATS that...". Riiiight?
Ascetic Form. Class abilites...that means FoB too, right? Oh wait, we're already restricted to Monk weapons. Duh. Speaking of which, abilities that let a weapon count as a monk weapon do nothing, because the style references the fighter weapon group, right?
Also, about ascetic style...which questions did I forget to even ask?
Rondelero Flexibility - useless other than giving you Improved shield bash for free during a full-attack.
Illusive Gnome Style - If you were doing a heavy feint build maybe? Yeah it's one that I don't really see much desire to use.
Overwatch Style - Yes your initiative drops to just before the person acting, just like normal for readied attack. But it does make readied attacks even more scary if you're wanting to go that route. I think it can be useful if built around it.
Startoss Shower - I think since it says is using startoss comet that you have your initial throw, then comet's extra attack, then add the (1 + 1/5*BAB) for shower. Otherwise if you got the feat at 4BAB it wouldn't do anything as you'd have already done 1 "extra" attack from comet.
Ascetic style - read from here to the end. If you still have questions let me know.
The writer said that Rondelero Flexibility was written the way it was because if it wasn't then we would think that it NOT being written like the Buckler Duelist's Strong Swing ability means that the Swash archetype can't alternate between falcata and buckler attacks. And I mean, he's not wrong.