It's true that a lot of the kids' CS selections are pretty bad, but there are quite a few that are different and more varied. You have to hunt around a bit, and not automatically choose a CS based on what the adults in the party want. Several of the CS that offer better kids' options are good choices for adults, too.
MK --
Casey's Corner: has no kids' menu, kids have same options as adults.
Pete's Doggone Good Dogs: no kids' menu, same choices as adults
El Pirata y el Perico: taco, cookie, and beverage
Main St Bakery: doesn't look like there's a kid' menu, so same options as adults.
AK -- CS not great options for kids
Flame Tree: chicken wings or hot dog (may be ok)
Tusker House: mac and cheese or chicken drumstick (may be ok)
Pizzafari: cheese quesadilla may be ok, but there is no pizza for kids! If your kids want pizza, go to Pizza Planet in MGM, WPE in DTD, or Tangierine in Morocco (isn't that funny??
).
MGM -- CS options not great for anybody, but...
Catalina Eddie's: don't see kids' menu? same options as adults?
Toy Story Pizza Planet: no kids' menu, same options as adults
ABC Commissary: doesn't get reviews, but kids' meals includes fried fish and vegetable noodle stir fry, specifies fries and soda available on request
Epcot -- some really unique and appetizing-sounding CS options for kids:
Cantina: beef burrito and soft drink
Electric Umbrella: standard chick nuggets and mac & cheese, but also turkey and cheese pinwheels, at least it's something different...soda and fries on request
Fountain View: don't see kid's menu -- same choices as adults?
Sommerfest: no kid's menu -- same choices as adults
Sunshine Seasons: sweet and sour chicken, mac & cheese, mini sub, chicken leg (this is a very popular CS for great adult choices, too)
Yorkshire Fish Shop: no kid's menu -- same choices as adults
Lotus Blossom: egg roll and beef fried rice
Tangierine: burger, pizza, or chicken tenders, all with fries and drink
Yakitori: teriyaki chicken w/veggies, rice, and soft drink
DTD
WPE: chicken fingers, mac & cheese (the GOOD stuff), cheese OR pepperoni pizza
EOS: PB&J, grilled cheese, turkey and swiss, pizza sandwich
Food Quest (in Disney Quest, requires admission): pasta, burger, hot dog
Cooke's: fish, battered chicken skewer, baby sausages, all with chips (fries)
If you just want your kids to be able to order off the adult menus everywhere, and the cost isn't a problem, then yes, upgrade their park tickets, and pay the extra $28 per day for the adult plan. If I had the money, that's probably what I'd do, because it's less planning and less hassle. If money was no object, then it wouldn't bother me if they wasted a lot of those 3 course adult dinners, or if they wanted to eat mac & cheese at Le Cellier.
But if you are a bit more budget minded, it's a
lot cheaper to order the kids' plan and share some of your meals with them (especially since so many people say there's way too much food on the
DDP), use snack credits to supplement, or order extras for them OOP. You can buy a lot of little extras for
much less than that $28 difference every day (plus whatever the park ticket upgrade costs).