Can't help with your demos personally, I've no access to TE nowadays.
What is weird in your situation Djarvik is that you proved in TS3 you have the reflexes to play very well in these tennis games... Perhaps you don't progress because you don't want to apply the real life principles !
In the past, I made sessions with some people and I stopped the game everytime I saw something wrong, to explain the problem in live... It's hard to reproduce that in this forum unfortunately.
What you must keep in mind is that your movement problems are actually the tip of the iceberg. It's a consequence of the situations I saw very frequently :
- The guy never hit a good deep counter shot in defense ; (so he will never take back the lead in the rally)
- He never aims for the line, playing too secure tennis (so his opponent won't be in trouble and will have a lot of time to charge and aim the lines...)
- He doesn't hit the shoulder accel when he has the occasion to because he doesn't know the concept ;
- He never hits short acceleration in risky situation (... or never at all = no danger for the opponent, at least in 1.16)
- He uses the slice stupidly, giving room to an easy short acceleration from his opponent
- He doesn't reposition himself at the middle of the angles possibilities, leaving a major part of the court empty without having Richie's level

(hence, he will run more, charge less, has less options to hit short acceleration)
- He's unable to hit deep counter service (= short return = he lets the control to his opponent = he will run a lot for.. nothing)
- He opens the court stupidly by hitting a weak shot down the line (in defense for instance.... perfect to give the control to your opponent 9 times out of 10)
As you see, the movements are interdependent of your attacks : during a match between a to player and an average one, the average will run far more because of all these things. If you want to move better, hit better, take more risks, just make better choices, improve your timing & apply the basics : repositioning yourself as soon as you've hit the ball and don't remain static. Being static in tennis or in game means defeat.
Now this list is certainly not exhaustive, but if you can get rid of these errors (which are all linked to real tennis I'm sorry : synchronization, timing, positioning, shot selection), you'd be be a top 10.