1. Character Unlocks(event keys): A mini game system, similar to Mortal Kombat X and Injustice: God amongst us (they are both game apps, available in many platforms); where you have a new character update every once in a while and you are given the option to either buy the bundle OR to engage in a combat with AI team that consists of different synergy and tactics, varying in level, ability and so on...
There is a system in this mini-game, where if you do not wish to fight the AI team, you can pay in-game currency to skip a fight and get closer to a boss fight. (Winning the boss fight will allow the player to move on to another chapter, providing them with various rewards... the catch is, if the player gets to win all the matches, he/she then receive the featured character for free.
With that being said, the challenge is very difficult and would ultimately encourage the player to either give their best shot and obtain as much reward as they can or to spend extra money or gems to complete the challenge. This way, many players will stop complaining and whining about the over priced bundle and they also have a chance (a small one) at completing the challenge.
2. PvP Arena video: An update, where in the future you can watch videos of how your match went, this way, if you won, you get to improve your strategies to maximise your potential winning rate and if you lose, you can change/modify your squad to improve your tactical advantage.
I believe by doing this the game would be more enjoyable, as players get to explore and analyse character and squads in greater depth, providing them with enhance gameplay experience.
3. Alliances: Players would be able to form alliances and to compete with other alliances online, just like in PvP the alliances in top gets the right to higher rewards.
4. More characters: I believe that there would be plenty more characters in the future, but as of now, there is not many (or rather the meta is still quite the same), time after time, I see Dooku, Barriss, Chewie and Sid...like seriously I have Sidious myself, as it was easy to obtain and I believe he is top tier character, but seriously I think the game need more characters as players are either too lazy or does not have enough time to invest in arena and other play modes.