I have an issue here with Hezza.
When we have a General Election, the political parties analyse the result. Those who have done well get the chance to implement their programme, sometimes in Coalition.
Those that don't do well tend to lick their wounds, analyse where they went wrong, they usually blame the electorate for not understanding their message, and eventually come back with a refreshed offering.
eg. When the Tories lost in 1997, they went through Hague, IDS and Howard before they ended up (unfortunately) with Dave.
The offering by the Cameron led Tories in 2010 and 2015 was quite different from the previous incumbents.
But with the Referendum result, Hezza, Farron, Clegg, etc are tryinhg to overturn it and undermine it before it has even been implimented.
I don't remember those that opposed devolution immediately campaigning to block it or reverse it, or have another referendum, or ask what sort of devolution the electorate wanted as they couldn't all want the same thing.
They just got on with it and set up the assemblies with powers devolved as agreed by the Commons.
With Brexit they should just get on with it and then once out, I think parties have the freedom to take whatever position they want.