I got UC yesterday and have been having fun with it so far, I played a little BCM when it was first released. UC is a big improvement over it from what I've seem so far, but there are a few things I didnt like which are:
You don't seem to be able to hyperspace to stuff unless its a LONG way off, which means a lot of just flying strait for ages not doing much, sometimes its quicker to jump away and then to the target. Maybe some time compression while in A/P which stops when something targets you would be nice?
The main guns on all the capships seem to powerful vs the A.I. they can rip through any carrier/cruiser in seconds and never seem to run out of power, even on 100% unless they are badly damaged. It can make combat to easy and feels like your in a fighter at times
I've been getting a lot of CTDs in roam mode, usually when random enemys show up (using rc7).
And the last is, it seems impossible to get back into orbit in some ships once you enter an atmosphere, I havn't tried this since patching though so I don't know if its still a problem.
Overall the game is much better than I was expecting from reading the reviews, the learning curve isnt THAT bad, I've learnt most of the stuff already (in 2 days). It seems most reviewers didn't really spend enough time playing it