Currently, within the foliage, shrubbery, bushes, etc, a player can run and sprint full speed through them. I realize this game is not a 1-to-1 realistic simulation, but my suggestion would be to limit the player’s movement while within the bushes. I would cut down all movement speed for running and sprinting to 50% (to start) while within the foliage. This amount could change based on play test results.
This would add a small layer of risk-reward tactics to the game. A player can use the shrubs as camouflage if they want to lay in wait while crouching down in them, but then they’re going to be slowed down if they try to escape or run through them.
. Do with them what you please!