I'm not sure if this would fit better in here or in Extra, but it seems relevant enough (unwanted faces would be culled if this was implemented).

Here's two glass blocks underwater compared with two beacons underwater:

As you can see, the beacons have an undesirable flowing water texture coating them. Some way to get rid of this for select blocks like beacons through the mod might be a good idea.

Sodium appears to affect this since a lot more blocks (such as signs and barriers) cause the rendering type glass causes to be used instead of how vanilla acts: CaffeineMC/sodium-fabric#991 - I'm not sure if it'd be possible to have this mod revert those changes until a proper fix is implemented over there if both are installed at the same time.

Water rendering code is a mess. Don't plan on touching it anytime soon, it has lots of conditions