I think this would be great and is certainly doable! To @Mircea_Braescu’s response to you:
I would say that this is something needed and if a tool can solve it they will have really accomplished something!
Assigning comments is huge, because if you can’t basically see if somebody is going to fill the request you are making with an @ mention in a comment, you can’t keep track of whether something gets done. Another piece of this is resolving comments, I have requested this as well: