Am I wrong, or does anybody else think Julia moved better and efficiently and in these days at Copenhagen than nowadays ?
Julia seemed to have quicker feet indeed but it's kind of hard to tell. I wouldn't say she was moving more efficiently but she was executing faster.
Julia made a lot of progress on endurance, being able to stay more physically engaged in matches and probably it penalized her footwork in the process.
She had such a lean body back then, similar to Djokovic, she was light and flying on court certainly -- by taking body mass then that could be the reason why she lost on the foot work --
In terms of foot-work, you can judge the efficiency of a player via the amount of screeches or noise their shoes make on a hard court surface -- players like Nadal, Federer and Djokovic exceptional movers have recurrent music with their shoes.
By listening here could say the frequency with which Julia moves her feet in this match is quite high IMO but you could still feel for example on the run and changes of direction for example she was heavy.
One thing I've never understood though with Julia's foot-work is why she doesn't do the cross-step when she turns around her backhand from a long distance ? In this match you can see her do it perfectly and many times in this match against Caroline.
On the contrary, she does a tons of small little steps which IMO kills speed and precision at times on her forehand. It makes her kind of rigid whereas if she did that, she would cover bigger distance and get to touch her forehand almost all the time like Federer or Nadal.
This close up video on Federer shows it pretty well at 0:33 -- he combines small little steps and a cross-step where his right foot like comes in front his left foot to turn around his backhand. There it's on a short distance but from longer position, it allows to cover so much ground -- I think I rarely see Julia do this anymore or probably I'm wrong.