sad, its obvious that you are looking to ditch the restrictions that straps create, so ditch them, alter your riding ( go around wave instead of over if it is that critical) if you must do a backroll to be happy go get your twin tip.
there is no compromise, what your idea of the elongated strap is a liability both in performance and safety.
crash&burn - your name says it all !
1 - there are NO restrictions what so ever. ( point them then )
( maybe the only one is doing a shuvit... but i'm not into skateboarding moves.... )
2 - it's impossible to go around a 100m long close-out, and even if it was 20 m i don't like to waist time.
( I have a limited time to go kitting, and if straps help getting more waves, the straps it is )
3 - freedom is doing a backroll if you want without having to go to your car or the beach to get the TT.
4 - liability? hardly in performance. SAFETY - try to go finless then...
( or maybe you already kite with no lines and a finless boogie board )
( oh man one day we'll kite with no lines! only a playstation type thing on your hands and soft comfy thing underneath )
5 - i can still go strapless when i want, if I want....
I can imagine big companies not wanting compromise solutions because they mean they will sell one board instead of two. " - oh, I really like the stance on my 5'4 to bad it doesn't go upwind as god as the 5'8... "