One of the things I've noticed when playing with my friends is that nobody wants to read skill books because it's super slow, and unlike SP, you don't have the benefit of using fast forward. However, we can already enable/disable sleep in MP for small/coop servers, which is a form of fast forward.
What I suggest is that an option could be added to enable or disable fast forward in MP, and the way it could work would be if every player in the server (again, intended for super small servers) presses the same speed button, i.e x4, then time will go forward faster.