After rolling up the Swashbuckler, I agree that it is superior. It's a similar playstyle, though not identical, but is likely more capable of filling in the role that the party needs in a fighter. I decided against taking Two-Weapon Fighting, but still stuck with the Swordbreaker Dagger. It's a tax of two feats, but I can attempt disarms at a +18, which fits the flavor of my character, and then the next round attack at a +16, dealing 1d6+15 damage, with a crit chance of 15-20/x2 for 1d6+23. The AC is 1 point higher, and I'm more comfortable with a lower Will save because I can boost it by +3 4 times/day. The deeds are very powerful, and with the amount of damage I can dish out, and the high attack roll and crit range, I don't think I'll be running out of panache regularly, so I can take full advantage of the parry and riposte abilities while keeping enough panache in the tank to fuel precise strike and the initiative bonus.
When I first looked at the Advanced Class Guide, I just skimmed over the Swashbuckler because I saw that it was a mix of Fighter and Gunslinger, and I just assumed that it was a firearm based class. I'm glad someone forced me to take a second look at it.