I feel like the rules are mostly there. The bones are there, but they made some choices that I think are huge missteps. Disengage/Jump being tied together as a bonus action weakens so much of the other movement options and cheapens positioning. Ground effects are especially obnoxious. Everything changes the ground all the time and it's exhausting. It feels incredibly out of place (do y'all want to make DOS or 5e? pick a lane). Dip your bow in fire to set it on fire and shoot fire arrows. Bleh.

Nothing that can't be changed during early access. Or, worst case scenario, people can just mod it to be more like 5e since the core rules seem to be faithful enough.