Actually, there are a lot of benefits to late seating. Particularly if your kids are big kids club fans and you enjoy dinner without your kids.
A lot of the family shows run over early seating. The pool reportedly is a lot less crowded from 6:00 to 8:00 pm. If your kids aren't the type to sit through a long dinner, you can let them swim/see shows/etc. Feed them at Pluto's or with room service, drop them off at the kids clubs while you go off to dinner, while they settle into an evening of Disney movies.
I like early seating, and will book it again. But on our four day cruise our kids only ate with us at dinner twice. They preferred the clubs - dinner was quite boring to them.
Make it up to them with nice sit down lunches in Lumiere's - which move a lot faster than dinner.
If you do have late dinner with kids, talk with your servers the first night about having their meals arrive ASAP. Some people have been able to get their kids fed before the entree arrives, then off to the clubs with them and mom and dad get a leisurely dinner.