No Way to Sim Battles?
I played the Star Wars, Marvel, and Ninja Turtle versions of the game before I tried this one, and all of those games had a "Sim Ticket" or "Warp Pass" to automatically receive rewards from a level you beat without losing any heroes. It cuts down game playtime considerably.
Why does Raid not have anything like this? Using Auto-Battle while my phone is in my pocket isn't the same.
Marvel also had a special auto-battle for the Blitz game mode, where the battle is run on auto without animations in a matter of seconds, outputting character health and victory status. This could be adopted to let you farm XP and still shorten repetitive battles that are locked in spectator mode anyway.