Regarding heavier paddler swamping over sides even on flat or small chop, I had similar issues, but more on waves and downwind. At Gorge, for instance: Bluefin, wet. V8 Pro, wet. V10Sport, a little wet. Swordfish S, DRY!! Obviously higher sides keep water out better when trying to overtake a wave or having a wave pass you by (or side chop, flat, etc). Higher sides make for tougher remounts as a trade off. I suppose the higher end skis have higher sides and drier rides, where remounts are not as common and higher end paddlers can remount anything if needed. If you can handle and fit a 45cm ski, try SF S. Are there any other skis known for high sides?
KR McGregor Rhythm, V10Sport, Swordfish S, Fenn Tarpon S, Fenn XT, Twogood Chalupski, Findeisen Stinger spec. Had: V12, Stellar SE, Huki S1-X, Burton wedge2, Fenn Tarpon