Proxy Defuse and Buffed Mines.
I would allow Proxy to defuse C4 charges from around 3 - 5 meters to allow her lighter/weaker frame to avoid certain types of AoE/Spam. Just long enough to be under cover on Victorias wall objective or behind a car on the pump controls secondary. Defuse from the centre of the carriage on Trainyard, forcing players to not simply camp the window.
The Buffed Mines are also fairly simple. Allow Proxy to “repair” her mines for 3 seconds to give them 33% more range and damage. This way you can promote a much more defensive play style for lower skilled players without making it a must do thing for attackers. Encouraging the engineers to stay closer to the objectives is always a plus.
