Battery hog and crashes all the time

For such an addictive game, things have trended for the worst lately. Compared to six months ago, I dont want to walk with it anymore on overseas trips because the battery consumption in the background with GO Plus is too strong, even on iPhone 7. Another major problem is the game crashing all the time. I cant leave my home without it crashing without fail. I think the Johta expansion has broken the tuning that this game had previously. You need a very fast device to play this game or else it feels sluggish and possibly unbearable.

Kaonashi5 about Pokémon GO, v1.31.0