A strong first release, to a sensible degree, is always a good idea----satisfaction with that snapshot in time as well as yourself having tried a variety of playstyles successfully beforehand would contribute nicely to the end result I'd think.
Interest in the Roguelike scene is a fluid thing at a certain point---generally for most projects it flares up in proportion to the size and frequency of releases, groups that latch onto it such as Bay12 folks, and generally waxes and wanes from there outside of hitting it relatively "big" and getting a nice community going that keeps at it in the middle and throughout.
So, don't lose heart, take it in stride, and keep at the fine work ever chasing that growing audience of players.