That’s a good idea, but separate work from what is planned for the upcoming Post-start join distribution work.
If we can hash out the specific details for a player score here, we can add it to both pre-start and post-start join logic.
A player score would have wider value too, even just as a means for players to compete for the long term. 
The details need to be hashed out though before we can get it on the #roadmap:to-do list.