Very close to something I would consider. Love most of the deets! My proposal would be:
Entire boot in plum grain (is this even an option?), else plum museum/plum grain would work
Brass eyelets (would look great with that color) or blind eyelets
Single Dainite sole
Cap toe (preferred)
Norvegese looks stunning. 946 last is also sleek for a boot, not something I considered but love it on the EB Austerity I bought.
To my sensibilities, the top 2 elements of your proposal (Entire boot in grain and Brass eyelets) would put this makeup firmly in the country / casual / workbook camp. It reminds me of the Carmina Winter boot GMTO.
My intent was to make this makeup equally at home for business wear, hence my choices.