Nice work on the update, I played about with the latest version and all the important things on the leaderboard are working fine, actual and relatives. There is one small thing but I don't see it as game breaking and will not affect the use of the overlays. The tyres on the leaderboard doesn't seem to grab the tyre info of opponents and will display ((T)(T)) for most. I did a race earlier and the pit function worked fine, could see who pitted and how many times.
Also, both the leaderboard and the tyre status overlay doesn't seem to properly update your own tyres all the time. When I'm on mediums it is fine, if I switch to softs it will take like 30secs to update to (S) and if I select hards it doesnt seem to update to show them, just seems to stay on (M).
Again, I don't find it a big deal as I don't find it too important to know opponent tyres. You will probably get sick of me reporting things and dread anytime I make a post lol.
I've provided a screenshot of the leaderboard, this was taken when I was just sitting in the LFM practice server.