I feel like if you're going to go super screen/projection-heavy, you honestly should go all the way. I feel things should either be all/mostly practical, all/mostly screens, or practical foreground with a consistent depth at which things convert to screens. I find random interspersed screens worse than an attraction that's 100% screens, like the screen where Ariel gets her legs or the random shattering mirror in Snow White's Enchanted Adventure. As a side note, this doesn't always apply to projection mapping, which can sometimes be very well integrated with practical sets, like in the switch from the Evil Queen to the witch.