it is YOUR choice what to do with YOUR quilts! if they would be better (re-cycled) there is no reason not to- you would still be using the vintage fabrics and possibly make an heirloom- it sounds as if they are simply utility quilts now- there is nothing wrong with doing what you want with YOUR quilts. some people would keep them as they are- and hide them away for (posterity) where someone else can come along and throw them out...or give them to goodwill-
if you re-create them - when you are gone someone may want to actually keep them