:armchair engineer sits down:
New floor for Merc, curious if that attached 'flap' "moves" with a certain amount of air pressure against it.
My guess is no, as I'm fairly certain there are regs against certain types of active aero and how much aero elements can flex. I forget who, but a couple years ago, someone was getting in trouble for a front wing that flexed a little too much -- I wanna say it was RBR or Ferrari.