I agree with this. What Brexit meant: a restoration of a national economy, insourcing and inshoring, renewal and regeneration and a coherent sectoral industrial strategy has not even been attempted let alone delivered. Some of us would add a massive programme of state intervention, nationalisation, tripartite collective bargaining and planning to the list. That was never happening under Tory rule, but the Tories have failed to even implement their own idea of it.
In terms of the ‘reversal’ I’d say that given the next government will be run by neoliberal Blairites then we can safely bet their longer term ambitions will be to test the extent that they can reverse the democratic decision, if not overthrow it completely. My guess is that the aim to effectively rejoin without rejoining though alignment and synergy.
However, the fly in the ointment is what will be left of the EU economic project by the time they get the time and space to collapse back into the EU structures.
The big problem for the Europhile British political/chattering classes and their allies in the downwardly mobile petit bourgeois is that their cheerleading for the EU has become so uncritical that they cannot grasp how the longer term prospects for the German economy, Ukraine, the populist rise across the zone and shift of other blocs away (particularly China and the USA) from the EU brand of neoliberal economics means that their hankering is actually for an imagined project of the 90’s. Their nostalgia and harking back will be confronted by shuddering reality in due course.