I am a big fan of Fire Emblem and FFT. But honestly I found the UO demo really boring so far. I don't know how long it takes to open up.
I get the point, you have these autobattler unit groups where you can program if-else conditions and change their formations to change the outcome of battles. So far, I don't feel like I have really gotten to do this though. I just move my guys around and they steamroll every battle. I am not even using the Jeigan character and it is still pretty uninteresting. I have already started skipping combat animations and I'm only around level 5.