This video in a series of BMA drills that Mikaela narrated (with demo done by BMA students) are superb.
It's the finer elements of the video drill that make the difference.
Holding the outside ski just above the snow, instead of a straight legged inclined position, brings the hips closer to level, and the transfer to the other ski is smooth and balanced. And there is minimal upwards movement during transition/transfer.
Undoubtedly Mikaela practiced and perfected this drill, and was able to put it to good use to win her (so far) only Olympic Gold medal in SL:
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Don’t want to nit pick, but she didn’t win the SL gold. Frida did. Being a Swede I felt the need to point that out...