Useful list.
My only comment is in relation to the variety descriptors. For example, with the 1921 shillings it would help enormously if you added which obverse type the pointings relate to, i.e. is it the obverse used from 1911 to 1920, or the one used from 1920 to 1926? I.e., that's your main variety difference, then within them you have micro varieties. (And this might also apply to other years where there are both main and micro varieties).