The void currently is very bland and boring so I want to suggest a few ideas on how to improve it 
1) Making the void actually feel like a place the player is not supposed to be in:
The void is a very interesting concept of a location that looks like it was abandoned and the player is not supposed to be there. This feel could 100% be improved in a few ways.
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Parts of old maps: The void could have pieces of the old map, oaklands legacy and woodmil inc terrain around it. The terrain is very distorted to make it feel more abandoned and broken
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Glitched terrain: The void could also have broken terrain to make it look like the game is falling apart at such depths. Could potentially add the https://discord.com/channels/865737627712749579/1482482492895264839 too
2) A shop 
I know it doesn't fit the void too much but there are some ideas for a potential shop. The idea is to make one piece of the old map have a shop that was overrun by voidlings that sell void stuff now. The shop requires void crystals as currency (like river shop uses lumite). The items in the shop include:
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The void vinyl: a vinyl that plays the music from the void and gives the void's black and white effect in the area where music is playing
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Camera stabilizer: when equipped allows using freecam in very limited range
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Crystal locator: starts beeping when moving in direction of void crystals. The closer the player is the faster the locator beeps.
3) QoL
We can all agree the void is annoying so there's a solution to make it better:
- Make voidlings worth killing: voidlings are pretty much just a nuisance to the player. Most people just throw them in void water to get rid of them. To make them worth killing, make them drop small pieces of void crystal like goblins so that players finally have a reason to actually kill them.