Problematic marine wall push off

So I know marines get pushed off walls to prevent from attacking players from angles, but its not working and still is abused. Right now, I just played a game were I died from being forced off the wall and having my own grenade blow me up.

So the problems are

• Marines can attack behind walls and is abused because some cannot attack back because of the camera angle
  

• This kills marines close to the wall (grenades and sometimes attacks due to forced movement)
  

Solution: Making the wall opacity transparent to unit entities that are hiding in it and more target-able to attack and of course, no more push off.