Franco wasn't really jacked around. He started 21 games in April/March and 23 in May. Only 16 in June but on June 20 he was down to a .693 OPS and had been actively benched. Then it all worked out. But really he only had a monster July, an acceptable August and a terrible September. His leveling off was just one of many things that led to the August swoon. Still not sure he's ever more than a .750 OPS player with below-average defense, even if it's at 2017 levels.
I still value Herrera more than Franco, which is why I'd rather have Machado than Harper. And I think, on a team with Machado and Segura, I also value Hernandez's offense (and consistency, when healthy) more than Franco.
No Machado, no Harper, it's a bit harder to rely on Franco in the short-term even if there's still a ghost of chance that he's a better player than Moustakas (or even Arenado) 2-3 years from now.
I think there's still a lot of trade market stuff left to play out that could still involve any one of Franco, Herrera, Hernandez and Williams.