I personally play on switch just because I've never messed with those settings in a pokemon game before. Also, I had no idea what that setting even did until after I started Reborn and read about it on one of these topics some time ago. I've thought about it, but overall it's probably not for me. I don't really care about the difficulty of the game to be honest. I'm just invested in the story. That said if there was an 'easy mode' I wouldn't even consider playing it. I guess I'm just a fan of default settings (until I beat the game, then it's challenge time.)
And I suppose with some of the things you and the AI can pull with field effects, inverse battles are kinda there. But no, there are no actual inverse battles.