ibdb lists only 6 musicians for the original run. I never saw the show, so I can't vouch for that. I would have expected it would have been bigger. (The playbill lists no official orchestra, and lists the 6 musicians only as being the onstage band for "Sing Sing Sing." Hm...)
But in that case, 14 live musicians this time around would be a real bonus, odd as it is to say.