Caustic Changes/Suggestions

I really like the idea for the lingering vision on enemies, however I really like that they block doors, if you are smart about it you can make some buildings "almost" impenetrable. (until more people learn you can blow up doors with grenades) 

I understand why they made the mines big and disarm-able, the problem is that everyone in the game knows to shoot the base of the mine and it will destroy it. It only has 1 hp so its instant and doesn't give any warning to the caustic player unless they are watching that mine specifically, and see that it is now instantly gone. Why not make the base have 100HP or something so that it takes a few seconds and bullets to kill it. Also make it so that the caustic player gets a warning (like when Symmetra's turrets get killed in Overwatch)