Hi,
I came back to Arelith after some long period away and found that Vigilante/Liberator class brings some really interesting options through their special feats.
But this got me thinking.. why not bake such functionality into Skill Focus feats? There are two tiers of those special feats, so ideal spread for skill focus/epic skill focus
Something like this:
Gruesome Technique -> skill focus set traps
Skirmish manuvers -> skill focus tumble (and allow the esf to add +1 more AC)
Hidden persona -> skill focus Bluff/Perform
Signature Weapon -> skill focus Intimidate
Simple Devices -> skill focus Open Lock
I mean it would open a lot more flexibility and build options to other characters, would mirror the spell focus feats but in a mundane form and would buff up Rougish and Skill based characters which are kinda always on the backend of power creep on the server anyway (bards excluded from that statement).
And you don't need 3 paths of a prestige class to maintain and balance around this way.