Hi,
have a look at this old workaround:
viewtopic.php?f=30&t=51062&p=254237&hil ... so#p254237
As you can see, ISO and the old false F-Stop (not related with the DOF effect), were doing the exact same thing as the exposure value, so it didn’t make much sense to have three parameters instead of one.
At the end, it is only a metter of habits, since you can correct the exposure in real time.
Personaly, now I’m used to use only the exposure value, and I don’t miss anymore the old parameters.
ciao Beppe