I just wanted to give this it's own space. I think these ranges are very important for the game, and in my opinion even more so in teams.
I would like to point out that it's not just about rating, it's just chess is a fun game vs people with a similar skill. I've had a couple of experiences now in team play with random partners after which I just don't want to play that way anymore, it was frustrating.
It definitely makes sense to prioritise having games running while the game is still acquiring a critical mass, but how about implementing right now a very wide cap that avoids extreme imbalances, and then making it smaller progressively?