154CM is a great all-around steel...many of my knives are in that steel.

For what CPM3V might give, for me it would be that extra toughness if I want to use it for cross-grain batonning for things like shelter building:
Now that was a blade in S30V steel, but thicker than what Emerson uses. The Emerson blades should hold up to such things fine as well, but in CPM3V I'd feel even more sanguine about such uses.
Some offerings in whatever the USA made equivalent of H1 would be great for people always around the sea.
I would see the idea being that 154CM remained the base steel for all the models, with some other steels as options for those for want them for some specific reason. Limited production, as what's being used thus far works just fine for most things.