Currently, there are too many champions in this game. In a season over season game, there is hardly a way to build and test all champions with the amount of resources we have and the amount of stamina that we get. To level up a champion from level 1 to level 100 it will take roughly3.16 million xp. That is equivalent to roughly 24 Goblin 3 runs at more than 50s remaining. This is a lot if we want to test different characters in a season that lasts only 3 months. If we want to experiment we have to risk burning resources that could be spend in Dungeons for gear.
My suggestion is to either implement the competitive mode settings for the overall game, where we level only 1 champion from 1 to 100 and we are able to utilize every other champion. We can probably do it 1 for each affinity. or triple the amount of xp pots we get from goblin 3.