if it causes even 0.0001% lag to the rest of the game, i'd say, better remove it.Incredibly boring, for sure. But not losing much, only a few easily restorable (Traz) units. Winning most battles on auto. Takes maybe 2 minutes or less for 5 battles. Getting league rewards from the chests. So why not do it? Not spending diamonds or medals on extra attempts. Don't care about ranking points.
say you'd rate GvG GbG and this Arena, with x/10, what would you put as average to each ?
in my taste, arena comes last with difference.
not that you should dislike it, cause i do, just can't see an actual reason of its existance unless it's testing