Personally I’d much rather see the required dev time go into more singleplayer content. The idea of 5 turns per second alone makes my head spin. It starts becoming all fast-action and no puttering around immersion, and to me that is a completely different game. Can you imagine a bear charging at you and attacking at 5 turns a second while your attention was diverted by a friend’s chat messages?
My vote is to stay singleplayer and concentrate instead on turn-based gameplay with depth and complexity.
I think co-op with friends can add a lot of fun to many games but I am not sure Wayward is the best choice for that.