It's pretty unfair that the opposing team just needs a tank and a bunch of resurrect and immortal Champs and they can essentially stall the game especially in the rotation mode in arena.
There's already a pretty bad imbalance in terms of legendary and epics but having to face several teams of stall immortal-resurrect teams just makes the experience terrible.
I'd rather face a team that can one-shot me than an immortal-resurrect team where I can't even see my other teams fight since we're stuck for 10mins on the first round