Here I go again:
Revert her ancient armor nerf, going back to 200/400 hp/armor. This will make her tankier against beams and other sustained damage.
Revert her ancient movement-speed-while-firing nerf back to 25% penalty. (Or get rid of it completely.)
Revert the recent boosters cooldown adjustment back to 3 seconds.
This will make her a mean, fast bruiser tank, that is extremely fun to play, which is the most important consideration if taking queue times into account.