Yeah, I hadn't noticed the erratum on the Sunfury until andrewm9 mentioned it. That does make a pretty significant difference.
However, surely even with a 64% dodge skill you only have a 1/3 chance to get three degrees of success - hardly reliable. I also hadn't realised that you can do dual-wield bursts, which is a bit scary - I guess with gunslinger and ambidextrous you'd be talking about a pretty scary number of hits on average, and you aren't likely to dodge them all. The fact that the pistol hits will be comparatively sucky compared with a decent melee weapon makes up for it, though.
Not sure about the multiple parries - surely if I parry your gun just before you squeeze the trigger then I end up parrying multiple shots. If I parry it a fraction of a second too late, then I either miss parrying altogether, or end up parrying some but not all of the shots.
I haven't made my mind up yet, fortunately combat isn't a major part of my campaign. Though this will come up eventually, I'm sure.