Not sure how possible this would be, but I think it would be nice for the ProTag that you select to also show the number of times that you have gotten it, the same as the locker room shows. This should make them more interesting as you could see how many times someone has made that nice streak, or done something silly.
It's be nice to show how many times I got NIMBY. I swear to God you goddamn supports, not in my backyard!
It would be really cool to be able to toggle if it shows how many times or not. Seems like it could be a bit of work adding the multiplier overlay everywhere the protag shows up. Would be fun to show off how many times you have gotten headcrabs and stuff.