i think kf should have a menue option where you can select which type of specimen skins you wanna play. during a seasonal event like xmas, the game would select the "xmas" specimen als default, but one could switch back to "classic" if he/she doesn't like it (and i know lots of people do that). and the game needs specimen skin packs dlc you can select in the menue as well. like the character skins it would be something players don't need to buy, but it would spicen up the game a lot. like undead war zeds, cenobyte zeds, zed police force, hillbilly zeds, glowing zed skeletons and much much more.