I'm not so sure about the wings. I like sailing around the cans, and I can see a crowded starting line posing a problem if I had large wings and went bulldozing through!
I think the boat I have right now fits me well (I-20): Great around the cans, user friendly, doesn't kill the crew as badly as a 6.0 with huge spin does, sets up in a reasonable amount of time (but reasonable for me is WAY different than the H-16 guys), great in light/mod air and chop, points high, drives low, easy to set/snuff spin. If I were lighter, I'd probably switch to the I-18. Right now, I need muscle on the strings, so my crew usually tips the scale at 180 or so. That puts us at 360 or better, which is a bit heavy for the 18's.
Would I go uni? Perhaps. One advantage of my sloop rig is I can roll up the jib if things get breezy and I need to make it to shelter. Sure, on this boat, it only removes about 50 sq. ft, but sometimes, that just makes me feel better than having a big sail downhauled and flapping in the breeze. Battens get expensive, you know!
For distance, I think it works pretty well. I'm sure there would be many improvements for each discipline, but I guess this boat seems to be a good compromise...