Seems a good solid start.
My only concern is that the Arena Pass character, Aran Tal, is too strong. It's always going to be a balance but introducing new characters via the pass means it would be tempting to make each OP to drive sales. At the moment, if you face a team that contains Tal and the player knows how to make the character work, then it's an uphill struggle to win. We'll see how future characters turn out but it does feel like there may be power creep and the game would have the whiff of pay-to-win, which could be bad for it's long term success.