I can't recall ever reading a mention about how the one length iron player plays wedges. I don't suspect there would be a problem keeping the 7 iron length and choking down if you wanted.
For full swings, I stick with the same setup/grip/etc. For 1/2 shots, I'll choke down just a tiny bit, and for green side chipping, I'll choke down a little bit more. The feel is definitely different from traditional wedges, but it feels very natural after getting used to the OL swing weighting anyways.
fwiw, green side is probably the best part of my game right now.