[Edi]

LDiCesare:

Map zooming exists in the game. It works by the mouse scroll wheel and the Page Up (in) and Page Down (out) keys. On an enormous map (biggest in the game), maximally zoomed out view covers one quarter of the map.

One key difference between CoE3 and Dominions is that units do not cost upkeep (that I have seen anyway), so building garrisons is actually a viable option. It is even necessary and unavoidable to an extent, since roaming independent monsters (and in the instance of certain events, hordes of special monsters too) will make mincemeat of your economy if your back country is unguarded.

As far as commander selection is concerned, CoE3 uses more of a Dom3 convention. Commanders and squares are selected by right-clicking on them and movement is by left-click.

The entire interface is going to be very familiar to anyone who has played Dominions and will not take a long time to learn. Especially once the manual is done.