Sadly don't have as good english to explain my thoughts about square nose but here i go .
If you struggle with i will talk to you next with my paddle

So here i go:
Don't focus on the square nose, just imagine your board as you step on a skateboard , feet on both truck : one on back the other on front one as you stand in surfing stance on your surfboard ( YES, these minions are surfboard, IMO)
This way you feel the board gliding from both foot not as pointed nose do, which are gliding from the back foot on the tail for the most of it.
Parallel rails avoid row effect so make a fast entry to take off early for it's size .
Square proportion of the outline magnified stability, might shorten size more and more getting use of it

And a lot more to say about.
Demo, i hope no hacking MINION DEEP OCEAN topic :