Icynorth, I'm not sure that I agree with your point about symmetry. On the whole I prefer symmetry, but I don't think any less of a grid that isn't symmetrical if that is done to solve constructional problems. In this case there aren't any bars to delete because they are not there, so to my mind it makes absolutely no difference whether the grid is symmetrical or not. It would have made a difference if there was no numbering because symmetry would have made it easier for the solver to fill the grid.
Symmetry of lack thereof is entirely the setter's choice, of course, but I wonder if an asymmetrical grid might have helped to achieve a better average word length, which is below the recommendation in Editors' Notes for Setters, and to avoid consecutive clashes in very short words. Those struck me as the main drawbacks of an otherwise superb puzzle, certainly one of the best this year.