So this is something that probably will never happen but I'll throw in my nickle.

I think Pokemon GO should add in a basic messaging system, that way you can message other trainers to trade, battle, or take on a raid. This would also allow for trainers to communicate more so they can become friends.

I ask this because I had a personal add me from Wales [thanks by the way] and I might have had my family come from there, so I'd like to learn more about the place.