1)2v2 ladder might be a great option
2)Other game modes such the goblin queen journey can be added,once a month or once in two months
3)Season shop should give 3 evo wild shards instead of 3 wild shards of a particular evo,which will boost the F2P aspect
4)Diamond pass should give 6 evo wild shards instead of 6 evo shards of new evo
5)If two evos are released,Diamond pass buyers should be given choice to choose between those two
Here are a whole new bunch of ideas in this image as well which I did
