1. tier network of core as upstream filters
2. no fixes because even with 99% users moving funds to segwit keys (taking alot of mempool bloat for months). 1% left over of quadratic/bloat spammers can remain with native keys and cause MORE disruption than ever before (16ksigops instead of 4k). thus no 'fix'
3. the 1mb blockspace will be its own cesspit of native spammers making the 'witness/weight' area not be utilised as promoted
4. promises to remove malleation to lower double spend risk of unconfirmed. but then adds RBF and CPFP to increase double spend risk of unconfirmed
5. due to native tx's even malleation is not 'fixed', just has a 'opt-in' tx type for INNOCENT users to use to disarm themselves from making malleated tx's

concise enough?