You can still use skills from previous branches of the class tree.
When you look at the abilities tab of your character sheet, you'll see the classes you've picked in the tree highlighted in blue. Click on one of the blue boxes and you can see the…
It's not an FPS; TR uses target lock and tactical maneuvering to make combat fast-paced, but it's definitely not an FPS.
In Auckland here, getting 250-300 to the West Coast servers (same as I got with SWG). Latency isn't an issue (server-side lag …
Dual-core > single-core for Tabula Rasa. I'm using an Athlon X2 3800+ and having no issues related to CPU. You'll be fine.
Graphics might need to drop the graphics settings to medium, but it's still a pretty game.