Excellent point and accurate assessment.
However, there were specific reasons why Trump was 100% deliberate here and utilized teleprompters in this speech. Trump was not looking for "smooth or vibrant" here. He wanted to make sure all his points were heard and not miss any of it. In addition, even the venue where he gave this speech was very planned and deliberate to ensure no unnecessary interruptions or distractions.
I’d rather that he refer to notes and drop the teleprompters.