remote egret
This isn't really anything that should be on the TOP of the list, but as one of the few people who are able to play the game with RTX, I have to admit it's... a tad bit underwhelming for what it's worth. In many cases, the only big improvement it adds to the visuals is Ambient Occlusion... which is something that should've already been implemented in a screen-space format to begin with, quite frankly. The Global Illumination and Shadows barely do anything due to the baked lighting setups, and the reflections are extremely noisy and splotchy due to what is presumably a low sample count.
This is nothing nessicarily big, but honestly, seeing the RTX implementation improved would absolutely make its inclusion feel more "worth it". Side note: Upgrade the DLSS to DLSS 3 whenever it comes out, perhaps?