This is turning out to be a poker game, with Core acting like they've got a royal flush, let's see if they get called.
Again, another mistake. 'Core' as a group is hard to represent, and does not have anything to do with this. The people who signed the agreement are the ones who are going to lose their reputation/respect if they fail to deliver a HF proposal.
Can someone with more brains than I have explain how an extra 1MB/10MB/20MB would make a lick of difference re: scaling?
As far as scalability is concerned, it almost does nothing to improve it. Moving from a 1 MB block size limit to a 2 MB block size limit would increase the average throughput from 3 TPS to 6 TPS. That's about it. Segwit does so much more and will deliver only slightly less throughput (on average) once adopted.