Re: A buff that would make Mirage potent, but not broken.
I've always wanted the idea of the control wheel addition to the tactical. I'd also add a healing (the decoy uses your currently equiped healing item) and a teammate reviving animation when they reach their destination, complete with their respective audios to really throw off an enemy.
I feel like the multi-legend decoys are unnecessary. That wouldn't make sense to Mirage's character and, with less Mirage decoys being produced, enemies would be more likely to shoot the actual Mirage tryna pull a sneaky one. Plus any legend could then run in a straight line to fool enemies.
I also think shooting a decoy should be more punishing. Make the tracking a brief but active indicator like Bloodhounds scan.