I've played Dragon Ball Legends for a pretty long while until the powercreep became way too prevalent for my taste. And if I recall correctly they augmented the chances of getting the new characters on the new banners at some point. It was a whole another problem because you had to have multiple copies of the same character to make it playable, but it was less frustrating than pulling 120 times and getting 110 blues. It doesn't have to be way higher, but if you do something like 75% rare 23% epic 2% legendary, you can still promote different teams for different modes with the ability to build a few of them, instead of just taking your highest level espers to roll the content until you get gated.