That's awesome. I haven't gotten my head around a swashbuckler myself, but the ones I've seen play definitely feel like they're "of a kind" with gunslingers.

It's worth noting, too, that the gunslinger "way" that you choose will define a lot of how the class plays. My pistolero's quick, seemingly careless gunplay will feel very different from someone who builds a sniper and is much more methodical and sneaky.