1. This is too much work for such a niche option, so I don't think so.
2. Yeah! I like this idea. Back when I introduced it people didn't use it because there was no visual clue, and then I added it. I can give the option to disable it (but it'll be enabled by default).
3. No... I don't think so.
Followers and lighting come from this repo, and icons as well. However, there is no branch with icons, lighting and followers and doing it by myself is basically impossible.
4. Yes, it has been addressed internally.
I am currently working on a big update, but it needs more time in the oven.