Icarus, Metron (or CTMS before it) is designed to spread out the arrivals so the rate remains manageable, nothing more. Feeder Fix times then contorl the actual sequence to the runway. I thought that was obvious.
If I have a published slot time to land in PH then that is my slot. I still get Julim fix times which do not in any way relate to that landing slot time. This means the system is already broken
Are you implying we just ditch one or the other? If you think you can hit your "published slot time" to the +/- 30 seconds you're better than me. What about if you get held up departing an outport due to traffic? You just arrive 5 minutes late and land in formation with someone at their "landing slot time"?
Of course ATC has to fiddle/massage/delay/speed up aircraft by issuing feeder-fix times
after everybody's in the air.