Rivendelboy
To answer:
1.The Treaties are impossible to reform for three reasons. First, it requires the buy in of all member countries, second, it requires the buy in of the EU, IMF and ECB and finally contained within the Treaties is the nexus of rules that facilitates the operation of the single market project. No deviation from these are possible (again unless you had all 27 countries under socialist leadership and demanding it).
2. The article poses a simple argument. That a unique space and opportunity for the transformative project of the type that Labour says it is committed to undertake in office was made more possible by the Brexit vote and that Labour could and should thought through and set out how it could maximise the opportunity and build support for it. It did not because Corbyn and pals viewed Brexit instead as a 'distraction' and handed the political management of the issue over to a Blairite (Starmer) and tried to straddle both sides of the debate. Given that neither sides position was fluid and not static and as positions on both sides have hardened Labour has been pushed by its middle class base to remain. Too little too late for the militant remainers, too far for brexit voters in its old heartlands and
critically towards a continued membership of the EU which will, via its treaties and modus operandi will eventually defeat any radical policy platform Labour may attempt to enact.