That entire segment is a massive homage to the original games on the Super Nintendo. Just watching that stage sent me flashbacks of the Space Armada level from the very first game, where you dive into numerous flying fortresses and demolish them from the inside.
The emphasis on rewarding exploration also intrigues me. The one thing I hope they'll implement, among many things, was Assault's system of wingmates rewarding you with shields and bombs every time you saved them.
I was actually reminded of the parts in Star Fox 2 where you infiltrate the battleships, fight enemies inside them and demolish their cores.
And yeah, I am hoping the levels are bigger to make that exploration thing more worth it. And saving wingmates and actually getting rewarded for it will be nice too.