I don't know if BitUsher is a Core dev, but it sounds like it here.
New compromise proposal -
Deploy segwit in April as SF but make signature merkle tree 1MB and remove incentives (unfortunately we lose some benefits here like Reducing UTXO growth but its a compromise)
Plan for a 2MB max blocksize HF for 6 months from now with a 95% threshold and 28 day grace period
I can be reasonable and cut down the HF window from normal 1year and offer a combined proposal.