I got to test the 8'5 Fanatic Prowave properly today in some very nice head high and above surf. Conditions today were close to being as good as it gets at my local spot. Calm sea, no wind and regular sets. Some of the bigger sets were refracting back off the rocks making a bit of a wobble at times but overall a dream day for a paddle!
Still only my third go on this board and I was wobbling around on and off but managed to mostly stay upright. Missed a few good waves later in the session once my legs were shot but managed a 2 1/2 hour surf despite my leg workout.
The board went great, bottom turns hard on rail better than any other board I've owned. I found myself surfing more relaxed, not having to wrestle the board through turns and flowing better. Several times I found the board turning faster and further than I had anticipated and my body position was a few steps behind. Its nice to have a board that is clearly more capable than me that I won't grow out of too quickly. I won't go on too much because I am buzzing after such a fun session and it probably would have been awesome on any board.

I have no affiliation with Fanatic.
Standard fins felt a little stiff to me, even paddling and kick turning I thought they were bigger than necessary. I have replaced the rear 5" Fanatic fin with a Shapers S7. Even at my size (6'3 and 97kg) I had no problem with unprovoked fin slides and they had good drive through bottom turns and fast sections. Still paddles pretty straight too. Next session I will probably try my Jamie Mitchell thruster sides with the S7 Shapers rear.
The main difference I found today riding the 8'5 Prowave Carbon Ltd was that the light weight lets you get the board back up the face faster and higher with less effort and when you get hammered by a set or two it hardly even pulls on your leg rope!
Cheers.