the correctors under the lugs make the case side aesthetically more pleasing, as no pusher holes clutter the case. Additionally, no tools are required to adjust date and moonphase. Your fingernails are sufficient.
I love the idea of the correctors being built into the lugs. There is no tool to loose and the case is cleaner. I think it also shows that Blanc Pain is furthering the art of watchmaking by improving on a very old idea. It is one of those.....why didn't I think of that kind of inventions.