Guess there was no blue nacelle glow even in TMP, oh wait!
You're grasping at straws at this point. Those are clearly screen caps of the ship just before jumping to warp. Forward a few frames to show the whole rainbow of colors. You go right on telling other people that they don't know what they are looking at though if that's what floats your boat.
Bottom line is, you're wrong in saying any Trek fan would not see that as a Starfleet ship. As a Trek fan, I (and others who have replied) see a Federation/Starfleet influence in the design the OP posted.