Yeah ... I do think a vclutch that clutches earlier in the temp rise cycle would be very cool indeed!
I will likely modify mine next time I get into the front of the engine or cooling system.
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg