Rave in the redwoods frame rate issues

Im having bunch of frame rate issues on the map especially around the mess hall, the frame rate drops really bad while looking at the magic wheel area from the bridge where a volk buy is or from the entrance of cabins or from the bride that leads to the boat house or lake. Not that big frame rate drops on other parts of the map but gets noticeable when you train zombies there, im playing on standard PS4, no any frame rate problems on Zombies in Space Land and Shaolin Shuffle. It makes me think that the developers didn't optimize the map good enough? also frame drops when you train zombies makes me also think, if lots of zombies creating frame rate issues then why not downgrade the quality of zombies' texture resolution and model detail when a certain amount of zombies group up together? the quality of textures and model detail on zombies must be the last thing people care when they're training zombies, of course i don't know if its already like that or that would be possible to do for developers but it would be good, im not saying it totally ruins the game or anything but you know, frame rate sometimes lessens the fun