One of my account has claimable mounts (1 per character) they provide small bonuses (like 6% potency) but the description says that stats only apply to level 100+. Instead they do apply to my level 90 toons. It's not massive, but still reportig. Anyway Fallen Gate is 500% P2win, last PQ some Beastlord topped the parse by a large margin, checking his character I found out that he add 3 ancient spell scribed and the rest was fully grand master. He also had all his wardrer grand master, i don't know if you can buy warder levels but it was weird since leveling warder takes time and that toon had only a few hours played. He probably had too an ethereal lvl 10 familliar but you cannot see that on the character page.
I agree there are a lot of "P2W" aspects on Fallen Gate. Just before DoV I had a Beastlord power leveled from 1 to 90, in that time I leveled 2 and almost a 3rd Warder to Grandmaster. Also there is a Beastlord quest in Butcherblock that allows you to boost 1 warder to Grandmaster.
