Thank you for the message,
I took a look at the SAN AnalogMove -plugin and there's no easy way to get it to work. I was wondering if it's written for RMMV 1.5.x version? But I'll get back to you if I get to work (not so easy way

).
Tall sprites might cause some issues (even without this plugin - for example star (*) tiles).
I have solved this issue with on touch events and
removed region ids. Events must have plugin commands "floor_level -1 high" (acting as region id 17) and "floor_level -1 low" (acting as region id 16). But be aware that events must be handled also "manually" if this method is used.
As a conclusion - I'll add new plugin parameter "Use tall sprites" to counter this issue. It will change followers floor level when ever player floor level is changed. Until next time!