I’ve seen a lot of people get confused by whether or not they used an angel comb already, I think a good idea would be to make angel combs that we already used visibly close, or faded, so that they don’t get confused. It would also make sense to disable their signal once used.

You can disable the signal by yourself (tab -> signals)
Yes, but most signals in the game disappear when you complete whatever is needed, so why not angel combs.

The Angel Comb signals can be helpful for navigation. I keep them on my HUD so I can better understand where I’m at. I like them. Like the comment above, you can disable them with just a couple of clicks if you want.