what im worried about is the amount of trees and rocks in each cell. Will the player be able to move around in the trees because the they look packed. Now it looks like from the pictures the cells need to be less packed.
Heres a question how many objects are in a cell?
You needn't be worried about not being able to walk through the forest, unless your character is obese (I hope not).
There's plenty of room to walk through the forest, but you will need to navigate yourself. My intention when creating these large forests was so that you might get lost in the sea of tree trunks and that you have to twist and turn and sidestep your way through the trees because, in my opinion, a forest like that was one thing MW really lacked. (And also because I love forests :hehe:)
Don't worry, though. I assure you that you will be able to walk through the forests. If I get the opportunity, I might make a short video walking through some of the forest so I can show you how it is like.
As to your question... the highest reference count in Tyrthol Coast is 725, but that is around the islands and is largely due to all the ice layers on the ocean. Most of the others are 200-300 references per cell.