Would be nice to have signs with certain graphics on them that you could select. Currently you can write text on them, and that's great, but it also means you have to interact with the sign to see what it says.
If you had premade symbols on the signs you could direct the player and give them information without being near the sign or breaking up gameplay.
Examples would be arrows, shapes, or even pictures of enemies.
Arrows: ↑↓←→
Shapes: ♡〇✖
Enemies/Items: 🐍🦇
Symbols: ❕ ❔ 🛑 🚫 ⚠️ 💀
Then players could even use these to help convey conditions for things in a certain room. Like "Kill All Bats" would be two signs: 🚫 🦇
And the community would inevitably come up with their own conventions.