I'm still in Silver myself so I don't get to see the full-effect of numerous abilities clashing at the level of gold/diamond/champ but it would be nice to see a lot more abilities added to the game, along with an additional level system so that a summoner or monster's abilities could improve with them.

For example, basic stat boosts like health, armor, speed, melee, magic, and range could become stronger than plus-one as a summoner levels up; and as for monster abilities perhaps just an increase of them.

I can't wait for the involvement of land to start becoming a more active part of the game, perhaps giving extra advantages and disadvantages akin to the battle rulesets.