No, I am accepting Tickell's version, which you and Salmond disagree with.
Where does Tickell make any comment on what happens next if Salmond wins and the outcome is that the decision is referred back to the Scottish Government who are required, under law, to take the decision again. He doesn't discuss this, but this is of course a necessary consequence of the things he does discuss - likely outcomes of a successful Judicial Review.
Whether or not Tickell discusses them in his article he well knows (as he is a legal academic) that were the outcomes he discussed to happen then the Scottish Government would be required by law to take the decision again. And he will know too, that there is no guarantee that were they to run the process again that the decision would be the same.
All he is saying is that, on a precise point of law, that a Judicial Review cannot reverse a decision (actually they can, but this is very rare and not really relevant here) but that doesn't mean that the ultimate outcome of a Judicial Review is that a decision is reversed. Were that not the case why would anyone apply for Judicial Review.