We already improved the situation by making sure that gameplay-wise meaningless props do not block the construction site. That prevents a lot of engineers from going up to the construction site. See also:
I'm not sure if we need to go further. There's also the aspect of playing the game the way it likes to be played - just like other games have certain limitations and being able to play around those is what makes one player better then another.
May I ask for a replay or two, just to see the problem? I personally did not perceive it anymore after the mentioned pull request .