I don´t think I will ever be a big fan, but there are two mechanisms that could be improved easily making it less annoying.
a) Why are we kicked out into the main map instead of the Soulforge leaving it? Clicking tiringly back to it doesn´t improve the fun for sure.
b) Please implement infinite team renewal. I don´t mind to pay gold for it, but the click orgy (see a)) is annoying as hell.
To be honest b) alone would make the arena much more enjoyable.