I just got a chance to play 4 player local coop and I found it to be a little difficult to organize and move as one team. First of all, everyone has to be on the same page. (this may be solved if everyone was good, but sometimes you have a friend who just isn't as good)
If someone died, he has no hat after spawning at a tower. Well that person is out of luck until we kill someone else and u can grab theirs or everyone runs back to the castle.
And, sometimes there was so much onscreen that it was hard to keep track of where your buddies are. There is a ton of stuff happening on screen at one time. As a healer, you have to be able to find your target to heal(not easy to select a specific teammate if there's a big battle going on. Then you have to keep track of where your buddies are, making sure you are in the same area.
There is so much going on, and there is difficulty of keeping track of everything (where everyone is, their health, the enemy, your princess, their princess, enemies around you, etc.)
I kinda feel like maybe 2 players local would be a more enjoyable experience. At least playing solo is fun still with the new classes. I just hoped the local multiplayer would be better.