This has been addressed before, and as we have tactical zoom in Demigod the use of the Minimap isn't quick issuing of commands but rather the 'situation at a glance'. The idea isn't to be playing the game via the Minimap.
Zoom out, issue your order, zoom in. It takes a little while to get used to, but it's the way Demigod is supposed to be played. I would suspect a mod of this nature would eventually be released, however.
imo we should be able to use both possibilities !
using global zoom is nice and beautiful (like it), but....
I had some situations where I missed the minimap-feature -> "zoom-out-click-zoom-in" needs more time than only "1 click" on minimap.
in most cases it doesnt matter, but in many combat situations, a minimap click would be very very useful !!!
so
for clicks-on-minimap !