i have same problem. It either can't find opponent or game drops after opponent is found.
another problem is, I have default Matchmaking options, but very often when opponent is found and I am being conencted, it finally drops with a message, that My squad level doesn't match opponent's level. Really strange as I left the match making option on default...
Can't understand why such games are then counted into statistics. Then when you look into Fifa14 details at you Xbox Activities, it is counted as Lost match. :/