I was really looking forward to this game and bought it on release day, which ended up being a huge mistake due to all the bugs that were still left in the game. At one point I got caught in an endless loop of falling through the pathway to my repeated death; another time I found a secret area off the beaten path, only to find that I couldn't leave it because I didn't yet have the story-related Force power necessary to get out, which is frustrating for a game the seems like it should reward you for exploring. And sometimes when respawning at checkpoints, enemy sprites float in zombie-like from nowhere, which is actually pretty hilarious to watch. I don't know if anyone else experienced similar hiccups - hopefully they've all been patched by now.
The game is very exploration-heavy, which is fine. Lots and lots (and LOTS) of vine-swinging, platform-hopping, wall-running, and fighting off the local flora and fauna more than anything else. The planets you travel to are fine, but I couldn't help but feel they were a bit lackluster compared to what the Star Wars universe is capable of.
The combat was just difficult for me to get into. The game wants you to follow a parry-counter attack method similar to Assassins Creed, but this is frustrating to pull off when 3 stormtroopers are beating your head in, 2 are shooting at you, and another in the distance is firing rockets at you, all while an overgrown lizard is chomping your backside. I appreciated that the game was trying to be different from the over-the-top-action-heavy TFU, but I felt like every little fight was unnecessarily long and drawn-out. Also, you lose Force energy in fights so quickly and for no apparent reason. I’d always be in a boss battle and ready to unleash a nasty Force-powered attack when a rare opening came, only to find that I couldn’t because the Force had somehow left me.
Story-wise, I was intrigued by the premise of Cal being a Padawan-in-hiding/on-the-run (the trailers emphasize this heavily), but after an emotional and action-packed prologue chapter, this story element gets dropped pretty quickly, and then the plot turns to Cal needing to find clues to access a Holocron that will help rebuild the Jedi Order, which didn't make a whole lot of logical sense to me or feel very compelling.
This is a more minor thing, but similar to what Kolgrima said, the lightsaber crafting was cool, but also disappointing that it had no game effect whatsoever (as opposed to what we've seen in KOTOR or TFU). Similarly, the costumes you can find are nothing more than palette swaps of what you're already wearing ... or you can put on a (gasp!) poncho, which for a graphics-heavy game felt like a missed opportunity or maybe just programming laziness.
After finishing the game a week into having it, I haven't felt any urge to come back to it. There's no real incentive to start the game over (unless you really want to find every lightsaber part and 'outfit' for the heck of it) - there aren't any post-game rewards or alternate paths/stories or different Dark Side/Light Side endings to unlock. I enjoyed the game well enough, but there were too many disappointments and frustrations for me to favorably compare it to past SW game greats like KOTOR and TFU. I think at the end of the day, this type of game just wasn't my proverbial cup of tea.