I know the feeling, between choosing where to eat and at what time I feel giddy!
The only one that doesn't appeal to me personally is Plaza, don't know why really, just think it looks fairly plain and imo there are better places to eat but I'm not sure what I'm basing that on as I've never been....?
I would do Inventions if you can as you are staying at the DLH and I think it sort of rounds a trip off there if you see what I mean. Plus the twice we have done it we've had brilliant character interaction (probably on a par with the funniness of Cafe Mickey), but with way better food and service! I am a big fan of there!
I love the look of Agrabah and my DD2 loves Jasmine & Aladdin so would love it, but we just can't fit it in this trip sadly!
I suppose it also depends on how picky/fussy your girls are with eating on where you choose? Buffets are always a good bet with fussy eaters as there will be something they can eat!!
We've never done Walts or Blue Lagoon before but we have them on our list this time. The food at both looks fabulous. I think the reason we didn't do them previous was the girls were very young and I just felt both places were not so suitable for them - better places to eat with very young children imo.
Are you bothered about character interaction? We like it as I can't be bothered with scrums in the park, so it's a nice way to see some and have some nice interaction. Because of this we are doing CM, Inventions, CCO and Auberge this trip

We'll be 'charactered' out!
Re Auberge - it depends if you think you will wait 1 hr plus in line in the Princess Pavilion if you don't go there? I know you said your DD3 was wanting to go. Could you maybe take her on your own and your other DDs and your DH go somewhere else? Would keep the cost down but also means the older girls might get to do something different....?
I've been no help whatsoever have I!