Ya! The hardcoded unit stereotypes (inf/cav/siege) are too...stereotypical. Some siege weapons can move around just as well as infantry can.

Y'know, the Napoleonix (that was a typo that I will not erase. As you can see Bartix is getting to me) era saw horse-drawn artillery... if only we could have horse-drawn ballistae... that would truly be a mobile force!