if you ask me it's worthwhile. they made some nice changes to stuff.... like some of the shooting/reload sounds seem a bit better. the flashlight flickers when it's about to shut off from the aux power draining instead of just shutting off. HDR looks nice (when you get to see it, since half of the episode is for the most part under ground or in a building without windows.... although you still get to see some HDR effects from the flashlight which you wind up using quite often). they get some pretty different facial expressions too. nice continuation of the storyline. could have been slightly longer, but still takes quite some time to beat.
And..... did anyone else notice that the bricks on the walls, and the metal panels on the floor of the citadel look SPECTACULAR!?!???
at first it didn't wanna load when i started a new game (bar seemed to stop about 3/4 loaded). actually had to restart since the task manager didn't wanna show up, Alt+f4 didn't work, and no message saying it crashed. after restart it loaded just fine, but had the same thing Luna had...... stuttering at some parts, mostly for a little bit after a loading screen.