I think its a really bad idea to force majority of the multiplayer population into playing maps they dont want/like to play.
Majority of MP players are not pro and neither have any inclination to be pro, I am talking about sub 1800 voobly population.
With this forced match making we will not be able to play a TG on a map which we like and at the same time ensuring similar skill players are involved.
I think a quick and easy solution to this is to show the elo rating in the unranked lobby. For ranked I don't really care too much since it shows a more diverse skill of players instead of being specialized in one map, but if people want to play the settings they like they should be able to do so with balanced teams.