The following observations are of course my personal view and do not claim to be the “truth”!
Here comes Kim Kyung Ah (South Corea) and Park Mi Young (KOR) in a package because of the nice rallies and because of their strengths and weaknesses being nearly identical in my humble view (Park being a bit more active with her forehand though).
- very good physical fitness and footwork
- consistent defending and pushing on backhand
- good forehand smash
- good variety of backhand serves
- occasional backhand block with pimples breaking the rhythm of the opponent
- often defends on forehand too high thus giving the opponent the opportunity to get in with a big winner smash or topspin
- often pushes the ball from the forehand corner with the backhand without any need. This push is also always with pimples so that there is not enough underspin to prevent a topspinner from getting in with a big, fast topspin.
- never twiddels such giving away the chance of confusing the opponent
- nearly no forehand serves
- the backhand defense has too few variety is spin. As far as I know and can see, she is using medium long pimples with which you don’t get enough backspin on short, slow topspins.
- to defend everything that comes as a topspin far behind the table is too much “old school”-defending.
- she should practice also forehand serves
- occasional twiddling would help, but only when using different pimples which get more chop and are more confusing when pushing aggressively close to the table
- a lot of pushes and stops into here forehand should be converted into a forehand topspin by hereself
- an at least occasional counter topspin from her forehand corner into the middle of the table (preferably with a lot of sidespin) is necessary to beat also one of the top ten players more than once.