There is a great article at betterwestcoastswing.com that teaches how to move more smoothly and look like an advance dancer even if you are a relatively new to west coast swing dancing.
It focuses on the followers but is important to read as a leader because it applies to them as well.
Here is the article. There is a great video with it as well.
https://betterwestcoastswing.com/followers-smoother-left-passes/
You know what to do: