Firstly, if what you say, NJ, were true - and it may yet prove to be so - namely that, in addition to the new powers to Scotland, there "should run a review of how the rest of the UK is governed and in particular how the issue that Scottish MPs are allowed to vote on matters which affect only England", I would have no great objection to that, other than that I feel the "Bishop Question" should be under investigation, too. (You agreed with me on that once.)
However, that is not quite the same as saying, as Cameron did, that these should run "at the same pace". That is, for me, the two (or three) matters could certainly be started simultaneously, although one would clearly take considerably longer to reach a conclusion on than the other one (or two).
After all, the WLQ has been around for 37 years, whereas the new powers were stated to be on their way into legislation between September 2014 and May 2015!
Secondly, you say with reference to the WLQ that it has had an effect on (quote) “some major issues”. Off and on here on AnswerBank over the years, I have asked whether anyone can give me an example of when that has ever happened. Until a week or so ago, no one has ever given me any such answer. Then, Thecorbyloon did provide a link for me that indicated two occasions when that may have been so. It seems, then, that twice in 37 years, the WLQ might have been relevant. From the way John Redwood and some here on AB rant on about it, one might imagine it was a bugbear that arose at Westminster every month or two rather than once every couple of decades!
So, if Cameron & Co make it clear that they DO grasp the vast difference between (a) a recent vow and its rapid, stated timetable and (b) a long-standing thorn in parliamentary procedure which will take longer to solve, I will hold fire on my condemnation.