This. I just mentioned in another thread that the Sage 5's in SPY27 are really great. A serrated version would be a quick buy from me.
I'd also love to see an Endela sibling added to the Salt lineup. The Endela has become the Goldilocks size for a lot of people. My K390 Endela has taken over my pocket, If I had a serrated Endela Salt in LC or MC I don't know if I would have much use (other than collecting) for any other knives. K390 for everyday, Salt for backpacking/fishing/nasty wet work or all the other times I won't be able to maintain my blade for a little while.