anything i'm liable to ride is pedal forward. some might even be considered semi, or fully recumbent. the major con for me is the dead weight in the saddle one. doesn't seem to matter how comfortable a seat you find, at some point not being able to stand makes it uncomfortable. i've been considering on a future build maybe some foot pegs further back to at least stand and coast, but since no ride i do is that serious i just stop for a minute to stand and relieve my butt. lately the longest ride i've done are mayors rides (10-15 mls depending on the route). about the same as a ride along the local river walk for me. on the river walk i may stop a few times, but ride strait through on a mayors ride. i'm real ready to stand by the end.
pumping harder is more or less solved by a seat with a back rest so you can push back against it to pedal harder.