Perhaps this is a case of weight rather than number of pieces? The larger blocks do have more mass.
Even though my regular LEGO purchasing patterns usually involve the Minifigure series and Spider-Man movies, I would probably say that Overwatch is my favorite theme. It’s on of my favorite video games, and the sets are spectacular. They’re iconic unlike the Marvel sets (which are still really good), give LEGO plenty of opportunities to craft awesome mechs that would feel like repeats in Ninjago or Super Heroes, and are overall just well-built and designed.
I really hope this line lasts. Maybe we can get cool skins after a bit, which would be really fun to see. Plus, the Brick Bastion skin is nearly proof that this partnership has to continue.