v25.5 Mac

Sometimes I begin writing a piece, say in 6/4 and then much later I realize that a 3/2 "underneath" would have been better to start with. Main reason being that if there's something happening on beat one, Finale puts in 5 quarter note rests. If i was in 3/2 it would probably put in a quarter rest and two half note rests - which would look much cleaner.

Now, if this piece was only in 6/4 I would simply select everything and have it rebar accordingly.
Now, I have two problems, though:

1. This is an arrangement and rebaring everything would destroy the composer's way of notating the rhythm of the music entirely - which I don't want to do
2. There are a lot of TS changes in the pieces, so I guess I would have to change every section with the 6/4 in it, which is a lot of manual work and there's still the problem with rebaring

Is there any way I can tell Finale to group rests in a certain way, but not touch notes?
EDIT: Funny enough, explode retains manually adjusted rests.