You missed out on one of the best games of this generation. The people that complain about the combat either suck at it or want to play the game like a hack and slash. Combat requires thought and is really fun once you get going. As for potions I didn't have a problem with them and they're completely optional however not using them might not be in your best interest for some fights.
I will admit I didn't have patience for the depth of the combat. I played it on easy to avoid having to take time to think through how I'm going to attack every enemy.
However, the other 3 problems I (and others) did have with the game were gamebreaking imo.
1. The restrictive movement that was referenced just a few posts above is a huge pain. You backtrack needlessly so much because of it. Your character can't walk over a stick nevermind drop down a 6-inch ledge.
2. The map/quest tracking is horrible. Particularly once Ch. 2 starts and you're in the city. There's no indication of levels on the map, for one. So you might be in the general area, but not on the right level. Plus, it's a huge, huge pain in the ass to get anywhere because of reason No. 1.
3. The potions take like 5 steps to make each one. Choice and depth is appreciated, but sometimes you just want to drink a damn health potion. In fact, most of the time that's what you want to do, and not have to deal with the time-consuming steps.
So, those are my thoughts. The storyline is amazing and the voice acting is quality, as well. Graphics are pretty good, and I actually did enjoy the combat when it was simplified enough for me. I'm also not ashamed to say I didn't have the patience for the in-depth combat. And I really didn't judge the game harshly because of that, it's much more for the other 3 things I mentioned.
Still, if you can look past those things or they don't bother you, there's a hell of a lot of game here for $15.