You are laboring under the misapprehension that Respawn makes changes to legends in the interest of game balance or pick rate balance. The opposite is true. They deliberately unbalance a legend or two every season now with the intention of making them so obviously superior that new and novice players will flock to them in an attempt to convince themselves that they're better at the game than they really are. Nothing makes a scrub feel better about himself than free kills. And happy scrubs buy crap from the store. Maybe I'm being cynical, but I'm about 99% sure this is how it works and why it works that way.