>>715384979
It's an optimizer's game. If you ever played a Fire Emblem game efficiently, you will probably find UO at least a little bit entertaining. I think a lot of people walk away with a negative impression because, basally, the game will not ask much of you to simply clear a level. You can sort of play like a retard and still win, relying on items and re-engaging the enemy multiple times to chip them away.
But if you try to play it well, there's a bit more ceiling to it than you'd expect. Not enough to sustain endless replayability, but there's some depth there. I personally enjoyed skipping straight ahead to the best kingdom after Cornia on one run (normally the 4th, after Cornia). Or defeating Amalia in Act 2, by actually 0ing her HP. Or figuring out the best route through Cornia itself on repeat runs. Or figuring out divine shard optimization, getting as many Sniper's Lenses asap, etc.
I would compare it to the Into the Breach level of depth or cognitive effort at the ceiling level, but Into the Breach is harder at the floor.