New shaders for water and the teleport "wall"? Sauerbraten nailed the water shader pretty well while the teleport wall effect from Warsow is pretty nice as well. Just wondering if these two things might be addressed in the future as the both look to be the original ones from quake.

For water shaders you should try maps like Ruiner and turn reflections to good in settings > effects. I am not sure about the teleport ones though