Hi Rick and welcome to the forum.
I just hook the seat back bungee to anyplace along the cargo well bungee -- quick and easy.
I agree -- it seems that the newer Poly is a little softer. I suspect that if true, this may be to reduce the incidents of drivewell cracks that occasionally occurred in the past. Or, this may have something to do with color selection -- hotter colors would probably have more flex in them. Even with similar colors it could have something to do with color blending -- if you look closely, each color is actually a combination of different colors, which Hobie changes from year to year. This could affect the surface temperature similarly. Too bad they gave up white!
There have been a couple of members who have experimented with foot operated rudder controls. Perhaps someone else has more info.