I have no strong opinion on that.It's good and I like where you have , and . but what if keyboard Shift and Meta switch places? Same for / and |?How about this one?Most prefered one for me.
Its a clear layout.
Only those ö,ä,ü could left for me. Its to specific for the world (opinion as german guy)
http://www.keyboard-layout-editor.com/#/layouts/5b345f9c3f7b142e6add280f30b3d279
I had | at P because that's a better spot and pipe is perhaps slightly more important than backslash, and also because P could stand for Pipe. Another option would be to have [ ] { } \ on GHJKL, so \ and | are both on the right.
One minor advantage of Shift Meta Z in that order, is that slash (Meta+Z) becomes a thumb-mashable combo. Having Shift+Z as an easy combo is not very useful.
I'm just giving some reasons for keeping it like it is. But I don't have a strong opinion on the order of Shift and Meta, and the exact positions of [ ] { } \ | (we could even put them in a row on Meta+FGHJKL, which frees up P for people who want to map £ there (P for Pound).