The biggest issues I see here are:
- Who, in your division, is searching for a match at the same time that you are close to your location?
- If no opponent in your division and location can be found, is it okay to be matched against lower/higher division players?
While there are millions of players playing the game, considering matchmaking prioritizes people near you, sometimes you may get matched with someone better or worse than you simply because they're closer. The other issue is, if you get matched up with someone within your skill level but they are further away, you'll experience input delay which could in turn make your gameplay feel bad and or put you at a disadvantage.
A friend of mine has been getting beaten to a pulp this FC, because matchmaking in his area just puts him up against people way better than him. I don't know how much more he can take, but I'm betting not long.