Technical Merit only means that they judge you based on the technicality of your tricks on stage. You will not officially receive any points based on your presence as a stage performer (although judges can give you if they want to). Your score will only be affected by the tricks you do up there, how hard they are, if you mess up or not, and how well you execute them.
That last part: Example- A guy does an eli hop, he gets more points. But if someone else does say a behind the head eli hop, or circular eli hops, then they get a lot more points. Difficulty determines everything. They won’t consider how well you coordinate the thing until finals.