For WOC dining packages, yes it's all standing. It is centered & some of the restaurants offer more forward views which along the rails can make for a fine view. However you still have to show up 60 min before the show for a railing spot. If you are interested in a splurge WOC does do a dessert party. It's the only way to get a seat for the show & provides a great view, great desserts & great service. Kids are the same price as adults ($79/person) BUT kids do get a glow with the show WOC cup which was so awesome. Some reviews have said the desserts didn't wow them but I was very happy with my dessert plate and some of the savory offerings.
If you have never seen Fantasmic yet, I highly recommend it & this is one dining package (unlike the WOC dining packages) that I feel is worth it's full value. We have done both the Blue Bayou (but with the previous version of the show from 2015 & before) as well as a new dining package offering- premium River Belle 8pm patio seating. With the premium River Belle dining you book dinner for 8pm (must call to book, not available online) and stay in your seat on the River Belle terrace which faces the Rivers of America to watch the 9pm F! show. River Belle for the meal is $45/adult $25/kid, then another $15/person for the premium seating to stay in your seat for the show. We did this to watch F! right after it came back this summer & while it was a great experience and we really felt super spoiled & waited on hand & foot, we would hesitate to book it again for two reasons 1) Only a handful of the tables are right at the railing closest to the water with a clear view of the show/stage & you cannot come early/request for/add a note to your reservation to get one of these tables. We lucked out with the closest table by the railing but paid the same price as people who were sitting in the back squinting & watching through heads to see the show, so it would be a very disappointing to get that view. 2) A closer view than the terrace can provide is a much better view of the show & allows you to appreciate the grand scale of some of the effects. For that reason, the Blue Bayou or regular River Belle (non-premium) are great options as their seating sections are up front and Blue Bayou is front & center. Blue Bayou will provide a seat cushion with your meal as the section is a seated (on the ground) section. When we did this meal package it was my absolute favorite way to watch F! as we didn't have to clamor for a spot and had room to breathe and saw the show from the best view there is. I'm not sure what the prices are for the Blue Bayou now but it was a pricy meal too but very delicious & well worth it for the food & viewing area. If you are looking for a Disney dining & show experience, you cannot beat the Blue Bayou F! combination.