The graphics in the video are fair for this genre; compare Slightly Impressive to early Wowcrendor, and the animation is about on par. Where Slightly is struggling is voice acting. It still feels a little too even-toned and short of emotion. I would consider doing a video with what you might perceive as wild overacting just for comparison.
Interested in the wide world of machinima? We have new movies every weekday here on WoW Moviewatch! Have suggestions for machinima we ought to feature? Toss us an email at firstname.lastname@example.org.