EVAS
With regards to EVAS:
I do not believe it is beneficial without fire suppression.
In the cases of UPS 1307 and FedEx 1406 there was no need for EVAS. If you look at the NTSB accident reports they did not have smoke in the flight deck until after landing and during the evacuation. Yet they still had uncontrollable fires which destroyed both hulls.
EVAS, I think is a genius idea used only in conjunction with fire suppression.
Class E to Class C ASAP!!!