I see on your Allwave you used a quad setup. I used the thruster setup on my Allwave and found it was like surfing with a handbrake on.
I solved that by putting a fcs2 USbox fin in the centre, its a lot thinner when looking front on than the C-drive, and then actually found the board faster. I also found they had heaps of hold but seemed to be at the expense of looseness.
I bought a pair of Quabbas as well but have not tried them out yet so can't compare for a couple of months at least yet unfortunately.