I absolutely love this. It would be interesting to see Alistair as a party member (along the lines of Kaidan) for your Spectre. Would you keep his personality goofy and non-committal? Or would you harden him and shape him into a no-nonsense Spectre leader?
This is defiantly the best transition from DA to ME along side Sebastian and Aveline, with the worst (in my opinion) being the Geth Shale combo... and this is not because of your art work mate, it's honestly top notch... but just because the Shale being a geth construct thing doesn't fit in my mind.