I don't really understand tightrope myself, it pretty much feels like he is mad that some players won't let go in mid-late game and can just win with call-ins.
I'm tired of every top 100 game being riddled with call in tanks and never seeing tech, which SHOULD be the core of the game, instead requiring call in commanders (many of which you have to buy)
I feel like I gave many good examples of why proper balance is unable to happen with this mechanic in the original post.