Anyone else finding the 2x Unit size of Darth Mod to be excessive?

My computer can handle it, but the small castles means it's almost impossible to line up your units and prepare for battle as they are all hugely overlapping.

Even regular battles on the map once you have a full stack it's hard to manage formations as each individual unit is so wide.

Anyone found a healthy medium for unit sizes?
Can I reduce unit size in the middle of a campaign or I have to start again?