active current protection with diode instead of shunt resistor
The issue with using diodes is the fairly steep V/I curve, which is temperature dependent. If you look at the curve on the datasheet you linked, the current associated with a 0.8V drop changes from 6A to 11A between 25C and 125C, and with the forward drop you will be dissipating a fair amount of heat, so the trip point is going to be less well controlled than with a shunt resistor.