Imhotep Evil
Torque Titan
Are you implying the manufacturer's decided to make the turbos more powerful only to compensate for loss of aero? And if they didn't loose the aero, they wouldn't have made the turbo's more powerful. I don't agree with that premise. In racing, especially in F1 there is nothing like too powerful. The manufacturer's would extract every last HP they can reliably extract under given rules (maybe even a little outside them).
Partially yes, partially no.
The turbo manufacturer teams Ferrari/Renault/Alfa-Romeo lobbied to FIA/FISA to ban the ground-effects, while the garagiste teams pushed for the ban of the turbos.
After the loss of ground-effects aero efficiency, the engines became (much) more important in the performance equation and this led to a sharpening of the (engine) competition and a rapid increase in horsepower. And more power also meant more wing=more downforce.