Thankfully they have slowed down otherwise we would see 7 new chars a day plus 13 talisman sets a week.
I pulled the green Hierophant and put it into the grind gang to level up. I don't know what he had for breakfast but a 4* level 7 with no talismans at all heals all allies for 38000+ HPs on his power move. It's not even stated that he heals but that he revives an random alliy with full HP. Might be one of the rare bugs in the game or I have (again) no clue what triggers what.
P.S: If I want to expand my char slots I now need to swipe 40+ times left. Same goes if I need a purple character in Gauntlet. #UIFail - and more characters don't do this UI any favors - just saying. I was thinking about getting a professional swiper to operate the game for me. But they charge 1 Cent per swipe - I would be ruined by the end of the week.