I would like to see this being compatible with other players. As in, I want to see the glowing eyes of other players who have also downloaded the mod, or if it is possible, it could be seen by anyone in the server.

If the mod is present on the server, the eyes will be seen by everybody with the mod installed. It would require a webserver to do it without the mod on the server-side, which is doable, but not currently planned.