almost any shape will go well in good waves imho, also the guys that test ride boards could surf on a door. its great that everyone is different and likes to ride different stuff.
I agree with both of you.
I show this kind of outline because it can be adapt to SUP for 2 reasons:
1/ the depression at paddling position can do a very effective row.
2/ as volume stand in ends the board is more stable than the Vangard type design.
Would be fun to ride however