Agreed! I am trying to find vanilla mods for XCOM 2, and am using the minus War og the Chosen tag (which should get rid of one of the most modded DLCs from what I can tell), but I am still getting tons of mods that start off with [WOTC]. Adding something that filters all mods by not showing any mods that require DLC you don't have would be a serious help in finding the seemingly rare vanilla mod content.