Hmm.. I think that sounds like a cute idea. ^^ It could be helpful, especially if you aren't already friends with someone in your group.
I see nothing wrong with this, and it might even come in handy if you're in a large map with your roleplay. It would also help mapless roleplays herd their little lost sheep together at home base, as well. (xD)
However, the fact that most people add their fellow group members as friends, anyway, might essentially override the need for 'group dots'. Not to mention, with the 'Find' option already in place within the Group Bio, there isn't really a dire need for this.
However, if it is chosen, it would be cute. c: They could be different colors, sizes, designs, and so on. ^^ I guess we'll just have to see if Kov comes back, for now.