Less practice means just too much chaos.Do they still take a spare car but in pieces? they may as well have a third car in FP1 the old T car system. Make FP1 only for reserve drivers 1.5 hrs and the regulars start FP2. Less practice does make better racing.
less work in the long run for the mechanics of Latifi and M Sch they can just roll out the T car.
Why not just completely randomize setups and give them 1 lap to fix it