Star Lord Element Gun Choice = Pre-fight ability
Given advances in the game and mechanics like pre-fight abilities, it seems that this could easily be utilized for Star Lord to enhance his utility and allow the player to choose between heal block, power drain, etc.
This would be nearly identical to the pre-fight ability of Stealth suit spider-man and would enhance Star Lord's reliability in end game content. I don't imagine this change would need the extended beta testing similar to other champs that receive a buff. I imagine many of the end game players would appreciate such a change as a way of acknowledging skill based game play over RNG. I'd love to hear feedback on this suggestion!