I cannot speak for PC. But as a PS4 player I currently use 48 with just 3 hot bars . For me personally you could add 1 more hotbar to add 16 more skills as a few of my 48 slots are used by emotes and mounts.

As long as they dont go over 60 its fine with me. I think if they went the pvp route with combos it could open up more slots.