I just added a complaint to a previous unanswered complaint regarding this. After 2.0 people stoped doing ranked arena because it took much time (hours to find someone), and now this... This is not CN servers, most people are here not to be competitive. There will be no great number of players for mobile game (guessin that will be releassed).
If by matching in arena means fighting someone with every char 2k life (and % rest of stats) above me means a fair fight...well, .. there is no well, i don't understand.