Zi0iP quit the game, not sure if someone else took over the project.
I haven't read the spreadsheet in a while but, from a quick look there are at least 2 things that I strongly disagree with:
1) Avior's awakening skill - It is an amazing skill, in particular the secundary effect! One of the best skills for arena.
2) PoP's awakening skill and the hero in general - One of the best arena heroes imo, and the awakening definitely improves him. I feel it is a misunderstood hero after all this time.