Looks like I go against the grain on this one;
Recently I put a full deck grip on my new 6'2" Resin8 ( still a ridiculously light board 62mac - I disagree about your weight claim anyway - if you just use heaps of little bits of scrap foam-grip )
My deck grip is made with lots of little triangles/squares - scraps of foam-grip.
I'd been having grip issues riding SUP with the standard foam-grip - guys over on Hawaii had come up with a way better level of grip using well spaced small scraps & I was blown away by how much it improved the grip on my SUP.... So I was then interested in how it would work for prone-surfing my 6'2".
It turned out as I was hoping - an amazing new level of grip!
I reckon I have 70% more control, & I can feel where I am standing on my board 100% better than with soft/hard/slippery wax.
No melting, combing, no more scraping off dirty old gunk every couple of months.
It's full-time wettie weather where I surf so I dont have any issues with rashes
give it a try - dont worry about the surf-fashionistas, there'd be no innovation in surfing if anyone listened to the boring old status-quo-quoters - too scared to try anything different