1. I'll take that as "no I won't prove it go prove it yourself"
2. You should focus on thinking over replies rather than trying to find a rebuttal.
Another thing to consider:
Without choosing doctrines, OKW, USF and UKF do not have halftracks. FRPs are a form of immobile sources of reinforcement. Are we to suggest that OKW also get 251 halftracks, and USF/ UKF swap their doctrinal halftracks with another core unit? All to make the game much more symmetrical?
There is also the tactical disadvantages to having FRPs in the first place. If you set up an FRP in the middle of, say, Red Ball Express, you need to send men in all directions from the FRP source if the enemy took over sectors near your base. OKW can branch out from their FRP source yes, that's kind of the point, but lack of emplacements outside of doctrinal choices means they need to move units around to take back points, or send men to reinforce a position.
End of the day, there are plenty of disadvantages to utilizing forward retreat points. Arguing entirely on the side of time needed for running from base vs FRP, and trying to advocate FRP's removel from only that perspective is, to say the least, idiotic.
1. no it means go find hundreds of examples in the Replay section of this website. You can look at my playercard and most of them were 3v3+ games and you think I played my hundreds of games as USF, all of them using FRP, then you are a fool.
2. When you mass retreat as sov, you are GONE for 1 minute +. If you mass retreat with FRP, you are GONE for 20 sec. Also, the longer retreat means you might choose to stay and take casualty because time is also a resource. the fact that you only have to retreat and be back in 20 seconds mean it is logical to retreat as soon as you get suppressed etc etc.
This is as close to the FACTS as you can get without using math. if you somehow convinced yourself otherwise, Im sorry, you are not a compatible specie to mine.
and so called disadvantages you mentioned I already countered like a broken record. so I am not going to reply to that.