with up to 4 players in a coop game, waiting forever for each and every character to plan
That kind of game would use lees than 5% of product owners.
Secondly, its possible to introduce a system for pre-plan in coop. In coop you can always have focus on your toon. Always have access to your skills and invetory. You could prepare what you want, at the moment its your turn, you just press a button. That way of semi-concurent turns gratly improve gameplay. And is handy for single player. In this case you always have focus of your next toon. So you can prepare in computer movement time. There is a lot of people quick people in single player who hates to wait for getting controls back. I can understated that.
Cut off current deep combat strategy is mistake.
