Though I haven't seen a lot of it, the parts that I have seen of Lakehouse seem really big. Are you guys planning on making maps about DA size, or CT size? Personally, I think smaller maps are better. As long as they are complex and strategic with vents and other things.
Lakehouse is roughly the same size as its counterpart.
I don't know the sizes of other maps yet.
Different map designs need different sizes for balancing and getting the artistic point across :)