I'm gonna suggest that it's underpitching that may be your problem. Were you using the Wyeast Activator pack or the Propagator pack? The Activator is larger & has more yeast. Even so, most liquid yeast packs (from Wyeast or White Labs) have fewer cells in them than dry yeast packs. A simple starter made the night before brewing may help to up your cell count.
Honestly, though, the SafAle US-05 dry yeast is the same strain as Wyeast 1056 (American Ale), it's a lot cheaper, & gives you a higher cell count. I'd say there's no harm or shame in using dry yeast. These days, much of it is great stuff.
Currently On Draft: Bamberger Rauch Dunkel, Belgian Blond, Pilsener Urquell clone, Smoked Porter
Bottled: Concord Pyment, Mi'Apa Sparkling Mead, Chimay Blue, Old Simcoe American Barleywine, Old Cantankerous
Fermenting and Conditioning: Pseudo-Decoction Munich Dunkel, Left Hook Bitter
Recently Kicked Kegs: Fresh Hop Pale Ale, Citra Rye IPA
On Deck: Old Rasputin, Northstar IPA, Ur-bock Dunkel