I think you handle the cards smoothly, the variation works, but I agree with Liquidsn. Awkward added time to something that a laymen would sub-consciously think to be a natural action, is when suspicious thoughts are born.
Your variation is actually quite similar to Liquidsn's variation, which I believe is still viewable on his youtube account (same handle).
However, since the pace of your variation is indeed kind of slow, taking a little extra time is not so bad, if it were not for your hand re-adjustments. Since you pass the deck to your right hand after the "snap" and showing the card change (which is a nice clean pause), the moment you pass the deck back to the left hand is when you should pull out and reveal the middle card. If you can eliminate the need to resquare, and re-position your hands before the revelation of the middle card, than I think the time delay becoms a very very minor issue.
Still seems like you are adjusting to the variation in the video, but I am sure you have been working really hard on it after reading the various feedback, so I bet it is a lot smoother now.