As a follower who has been danced with multiple guys, one suggestion I would make is to listen to a lot of salsa music... whilst brushing your teeth, combing your hair, walking to/from work or school.
It is possibly a simplification on my part, as some people hear different things in music, to say "listen to a lot of salsa music". But, the more you listen, the more you get to know songs/the music becomes more intuitive. Therefore, even if you are not
physically moving, mentally your
brain is moving and then when the brain tells the body "move", ie step in and take the girl, your body will move and your feet may be where they ought to be in the song.
Also, bear in mind that even though the guys may have stopped dancing, the girl is still moving and you can use her movement/momento as a metranome for you to pick up. Therefore, if she is on a back step with her right foot (unless she is doing intricate shines), then your step could possibly be a left foot forward. If I am counting it out correctly in my head

you would be on the sixth beat of dancing On2.
One of the tips I was given for when dancing (even without changing partners) is that if for some reason you go off beat or have a blank moment, use the guy's movement to get back on track. Similarly, a beginner/improver guy could/should use the more advanced female's movements to get him back on beat/on movement. I do not see why this tip could not work when swapping partners. This is assuming of course, that she has not go on the wrong track herself!
