Need the experts call on this one guys and girls.
I have nucs ready for the first warm day...Leave them with an empty( Drawn Comb only) deep or move all to a 2 level nuc?
Upper Deep is packed...Good Numbers as well.
I've always left them alone. Most of my bees are in the top box by spring, and then I just reverse the hive bodies when it gets warm enough.
justgojumpit