Some thoughts so far:

1. first thing people noticed is that it breaks segwit
2. “ initial feedback was all positive”: then you didn’t do your research as was pointed out by Kanzure there was plenty of discussions and feedback and none of it was positive: https://www.reddit.com/r/Bitcoin/comments/63b8lb/purse_extension_blocks_ready_for_liftoff/dft4nj1/?context=1
3. “ Before Core’s anger, everyone we talked to liked it”: most people don’t understand Bitcoin and the security issues that come with it. You should’ve done actual peer review before running to the media and lobbying people that are not technical enough to understand the issues.
4. Segwit IS a block size increase and you keep spreading false information.