Higher ranking matches can go on 30 minutes plus

When a Talent level 34700 vs another 34700 talent level. Sometimes the match can go on for over 30minutes long when set to Auto. This drains a phone battery and uses a lot of the onboard graphics card.

1.Should there not be a death match sort of ending if the game goes on longer than 5-10 minutes?

2.The reward for staying on the 30minutes game is miniscule also. It doesnt make the higher matches worth competing in. Making users prefer the low risk, quick win reward games, over higher level battles. This is for the weekly Tours etc.