I enjoy the OC, and there are a few simple ideas that could improve it's replay value (if anyone could do it, that is):
1. Skip Act I entirely. For the big fans of the trial and the xroads Keep :)
2. Skip any and/or all companions intros... I was thinking of grobnar, but if any selected companions could be sent straight to the Flagon, all the better.
3. Increase/decrease npc's/monsters difficulty by giving abilities bonuses or penalties to all of them (except companions).
4. Streamline some quests regarding area loads. Really, when u spend more time loading areas than playing it's not fun. NPCs could meet the PC wherever he is. The quests of the citywatch/thieves guild pop into mind.
10 - A Masterpiece, Genuinely Groundbreaking 9 - Outstanding, a Must Have 8 - Excellent, Recommended to Anyone 7 - Very Good, Deserves a Look 6 - Good, Qualified Recommendation 5 - Fair, Solid yet Unremarkable 4 - Some Merit, Requires Improvements 3 - Poor Execution, Potential Unrealized 2 - Very Little Appeal 1 - Not Recommended to Anyone