Right I think you are missing the point here regards the 'leave' campaign group not having a plan for brexit.
Yes - you are entirely right in that any 'plan' is something that has to be determined, pursued and carried out by the ruling government. However - and this is the reason why the journalists are so gobsmacked about this admission - for the 'leave' campaign group not to have a plan it suggests they fought this campaign without proper consideration of what brexit actually means for the UK.
It's like deciding to sell your house and buy a new one in a completely different area because you want a better way of life but without doing any research about the local facilities, schools, shops or transport links to determine if the move is in your best interests.
Any rational person will have a strategy about what they want to achieve with such a move which they then research to discern if it's achievable. You don't just buy a house and hope it works out.
Their admission suggests that they have not done this research, they haven't considered the different options, they haven't determined if the extra two-hour commute to work is going to mean less time with the family or the lack of good schools in the area means they might have the additional cost of sending little Johnny to boarding school. It does suggest that all they have been concentrating on is that they could use the extra bedroom as man cave and there's room for a hot tub in the garden.
In fact, it also suggests that they didn't think they were going to win. Johnson and Gove didn't think Britain would vote to leave the EU. They thought it would be a close call but they wouldn't actually win. Then Boris could come sweeping in as the new potential Tory leader with talk of renegotiating our relationship with the EU as someone with a better grasp of what the British people wanted.
Except that hasn't happened and Cameron has resigned and it's all gone rather quiet.
That would explain why Boris has said there's no rush to push the Article 50 button just yet, or why Gove is talking about informal talks. The moment Cameron resigned and passed the buck to the next PM (which I really don't think is going to be Boris but rather suspect will be Theresa May instead) it dawned on Boris that he hadn't won after all.
They've just played a bluff and to their surprise it's been well and truly called!
Farage on the other hand has behaved liked an untrained puppy throughout the whole campaign leaving great big massive piles of smelly poo in every single room!