Canucks fan here.
Sailing gloves are a great idea. I've just never got around to it....it's been on my list for a while. Usually by the end of a season my hands are calloused up pretty good...
Holding the main sheet unlocked is good advice. I find though after an hour or so in heavy wind (without sailing gloves

) my hands and arms start getting a bit tired, so I'll cleat in...but try to keep myself ready to snap the line out quick if I need to. Sometimes you're just not fast enough though.
Typically I'll uncleat the main, I think in that clip I was a bit more hurried than usual. When righting, it's a bit different than the dinghys I've been used to. I find when recovering in a dinghy, as the mast and sail are coming out of the water the boat tends to rotate into the wind a bit on it's own. With the Wave, not so much.