You're focusing on Swords, but both Shotguns and Spears are not nearly as feat dependent as you're making them out to be, and it's a shame you didn't dabble in either of the two as they are a ton of fun. My Spear build turned into my favorite build hands down, and Shotguns were up there as well.R Builds are pretty much done at lvl 6 with Full-Auto.
We have Mechanical Pistols which absolutely suck balls in Dominating but you need just 2 feats to specialized on Energy Pistols or Chemical Pistols. I'm running such a build in another thread and it's working without 4 basic Pistol feats.
On the other hand, the new weapon-builds don't work without 6+ specific feats. See Swords with Flurry, Parry, Riposte, Ripper, Onslaught and probably 2 more feats. Because of this all Swords builds will probably be similar and foreclosed.
Honestly, I don't like the newretarded-proofstreamlined build paths. There should be less weapon-specific feats and more multiple-weapons feats.
Regardless, Toro is right in that there definitely were problematic aspects to Expeditions. I liked it much more than him and most others, but even I can acknowledge it had some weak moments that will hopefully be fixed in the coming stand alone DLC.