So I think you are deciding between the 3 QS places? While the food at Yorkshire County Fish Shop is straight forward (and very tasty) seating is hard to find and you may end up fighting off a gaggle of hungry ducks and seagulls. I also don't find the portions as generous as other QS spots. Maybe first start with a hard look at the updated menus on WDW dining reservation site for Katsura Grill and Tangierine Cafe. Katsura Grill has an incredible, somewhat hidden dining area gem behind the restaurant in their garden/pond area. So if you choose that one, don't sit inside the little fast-food style restaurant unless it is raining and you don't want to eat outside. That area is probably one of the prettiest, little hideaways in the park. However, the menu can be a bit challenging for many people and I find it limited. I'm not a fan of their sushi, don't care for the teriyaki and while I love tempura, I don't like it soggy on top of noodles and broth. Personally, I prefer the food at Tangierine Cafe and also opt to eat at one of the outside tables in the shaded part of the Morocco Pavilion. Generally, many consider Tangierine Cafe to offer the best QS food & portions in Epcot. However, it may not be to everyone's taste so go back to the updated menus for your decision. Enjoy whatever your choose!
