I am liking the Vigilante, I didn't think I would. I know their is a lot of problems with function and powers, and the sheer fact that it really isn't appropriate for all campaigns, that being said. I am hopeful most of what exists will be fine tuned by the time it sees print.
That out of the way I would love to see some stuff more unique to the avenger spec.
Design space I am thinking about:
Exotic weapons, I feel either as a talent or as part of taking the avenger's specialization. Things like Bolas, or a whip, or even a repeating crossbow come to mind as very vigilante like weapons, and I feel that having a unique or rare style of weapon would synergize well with the features already in place with the class.
Thrown weapons, I would love for the avenger or perhaps the vigilante in general to really excel at thrown weapons. Why? Well it is not something really claimed by any of the other classes. A talent tree that promotes deadly or rapid throwing would be cool, perhaps the ability to make ranged maneuvers? Throwing a chakram to disarm someone is very vigilante! maybe with ricochet or returning style talents.
Gadgets, okay maybe not an avenger talent tree, but being I see a lot of talents that would want me to have a Gadgets specialization. I want to be able to fire my grappling hook crossbow, throw smoke bombs (kind of can). Bonuses to alchemical items, having vials of acid to burn through ropes, just happen to have a cold iron dagger in my cloak when it turns out the big bad girl is a Fey. All very vigilante in my opinion.
Hopefully these are ideas other people would like to see as well, or can find their way into archetypes in the future. Didn't want to miss the opportunity to voice what I would want out of the class.
I want Signature Weapon to be a class feature, not a talent. I would love to see that exist as the Avenger's means of improving his combat prowess, have it include proficiency, and have things like gadget talents that improve the weapon's uses in and out of combat.