Need some shapers help....

This is the new one I'll be working on.
It's designed around my 8'7" which went amazing (best thing I've ever ridden) but I'm changing a couple things slightly. That being rail shape, bottom shape and volume distribution.

I've tried to keep volume around 105 to 110L but lose volume in the tail. So there is more volume forward of centre. I've brought the tail in about 1.5" but kept the nose slightly fuller to keep some glide when paddling for waves. I've reduced thickness in the tail. Bottom will be double concave V tail into flat middle and single concave nose.

8'8" x 28.5" x 4.1" and 106L or there abouts.

Any problems here that I can't see?

One thing I'm trying to reduce is the board slipping on bigger steeper faces. 4ft and under my 8'7" was good but over 4ft and it would sometimes slip/not hold. It's not a major problem but I've experienced it a few times. I've noticed the new small Naish's now run an edge on the bottom rail to almost halfway up the board. Would this help the rail bite into a steeper face?