I agree with all your points. See, almost all trains coming from PTKC side can cover PTKC-JRC section in 1h 30min easily and are provided with ample slack. Long ago, they were detained at Outer or at Suchi Pind. Nowadays, they are placed at PF3 ensuring that they don't block mainline by early arrival. In my opinion, updating PF2,3 here would be better :)