I have a friend who would like to play Ashes, but can't stand the way units move so slowly. Truth be told, I share this peeve as well, but it wasn't enough to stop me from enjoying the game.
I've checked Derek Paxton's modding guide posted by Island Dog and I didn't see any way to affect unit move speed. If I am dumb and just missed it, please feel free to point out both of those things. If not, I'd really like some help in figuring this out. At the moment I'm sifting through the games files hoping to get lucky by finding another excel file full of all the unit movement statistics, and if I find such a thing I'll be back to post about it.
Now I know someone will point out that I can adjust the game speed and this should effectively solve the problem. Unfortunately this introduces a new problem: faster AI. Increasing the game speed also increases the speed at which the AI plays it, effectively bumping the difficulty by quite a bit.