Personally the commentary has potential. The video quality is great, which is the main thing BUT the audio quality during conversations is way too low. You need to be going into your videos manually and upping that audio, so people can take in what the characters are saying. If you have dropped the audio for your own commentary then turn it back up to neutral, or slightly above just to give story scenes dominance.
Back to the commentary though I think sometimes you state the obvious a little too much. I think you also talk too much over what certain people/ things are saying like the animus for instance. If you wish to do that then slap the subtitles on as it can actually infuriate viewers if this is a brand new experience for them. You need to decide what kind of LP this series is going to be in your title too. Is it going to be a playthrough, or a walkthrough? Even if it is both but I am thinking walkthrough seeing as you seem to know what is going on you still need to let the viewer take in what is being said.
Try and fit that commentary in-between game speaking segments during post production to make it easier. Again if you wish to talk over it then put the subtitles on as some viewers want the 100% game experience without you explaining it to them.