I played it twice as well. The first time I was on the 2nd highest diff. the second time I was on the highest. The first time it took 15 min. The second time It took me 25 - 30 because I couldn't keep the damn camera where I wanted it. (RB is your friend). Before you get to the boss is where I kept dying. I eventually learned that you could just shock the storm troopers to death, and it made the game easier and more enjoyable.
Here are my complaints:
The opening cutscene had a Giant Hang and it made the voice syncing off by about a second.
I hate the targeting system. It never lets me pick up what I want.
Camera turnaround using the second analouge stick is too slow.
The AI is completely retarted. They will continually stand there and shoot at you while you are blocking and either kill themselves or all of their teammates.
The limitation to only pick up 1 item at a time (can be upgraded maybe?)
The inability to walk while holding things (can be upgraded maybe?)
Force length is somewhat limited (can be upgraded maybe?)
Blasting-open doors SUCKS.
The cinematic character model for Vader's apprentice looks strange around the eyes.
But:
It was still pretty fun despite my frustrations. Hopefully you will be able to upgrade the things I didn't like.
I did like the combo system to an extent. X-X-Y is awesome for taking out enemies.
Graphics are nice, and visual effects are top notch.
Story seems somewhat promising.