Matchmaking problems
It makes sense, if the playerbase is small, at any given time, how many teams will be there trying to play with rating close to yours ? I will say not many.
Ya middle of the day is rough, not many on at all so doesnt matter what systems they have in place your going to get the same match ups.
In the evenings this is highly unlikely.
Resolution = Care more about spvp and fix / implement a bunch of stuff you have promised and bring back the player base.