They want to activate segwit WITH the hardfork, not separately, nor before the 2MB change.
I agree that the proposal is not "what we expected". But it's pretty close to proposals where Segwit comes first and 2MB, some months after. The item that mostly worries me from the proposal is that it doesn't address quadratic validation time.
Couldn't it be possible to change the proposal very slightly, allowing only 1 MB for legacy transactions (P2PKH/P2PSH), and to make the 2 MB change exclusively for P2WPKH/P2WPSH transactions? It that was possible and accepted by the miners, the most worrying problem would have been solved.
Bitcoin core has taken the position of 'no hard forks ever'
Thus unless the miners want to fork, bitcoin core will simply take over
in blocking mode from BU and stop this dead or if desperate, do UASF
They, up to this point reject any type of hardfork period.
Thus miners will fork or fold imho.