Eh, I wouldn't do both. It's not so much the abundance of food but because you'll spend hours of your park day at a table. I visit WDW more often than most and even I don't want to sit inside a restaurant at Epcot for 3-4 hours of my park day. If you have children, they will be even less likely to want to do that =)
I enjoy Teppan Edo a LOT - and actually think it's a refreshing choice because it's not real heavy. I actually don't like LeCellier at all but if I was going to bother getting reservations there, I'd eat a steak and potato since it's their signature dish (while also filling and heavy!).
Epcot has the very BEST counter service spots in all of WDW - I'd hit one of those for a meal and dine at a table service the other.