Adding the mob vision shaders from spectator mode, when spectating mobs Creeper, Enderman, and (Cave) Spider is a great idea. The creepers see in a greenish-tinted pixelated way, the endermen see everything inverted, and spiders and cave spiders see multiple m, due to having many eyes. It is a vanilla feature in spectator mode, so I think it should work. Maybe you can even make the Warden blind if enough people are on board with it!

Good idea! if Warden will be blind, it should see vibrations!