I wanted to answer the poll but couldn't find an "Other" option. I don't want story arcs, but I enjoy campaign settings and I wouldn't mind conversion guides for older editions. I enjoyed Frog God's Fifth Edition Foes and would like to see more monsters; I wouldn't mind alternative rulebooks a la Complete Psionicist's Handbook or The Complete Spacefarer's Handbook, or GURPS: Martial Arts. Not character-oriented splatbooks but actual option rule systems, like the 10 pages in the DMG but expanded. Just as I can today say "I play 5E with a Speed Factor Variant" I would like to be able to say "I play 5E with Psionics" or "I play 5E with High Tech" and have people know what that implies, i.e. without having to explain my house rules.
My ideal product output is therefore "campaign settings and occasional rulebooks: over the course of five years I'd like two or three that I'd like enough to buy, so WotC would probably need to make five to ten, or about one to two per year."
Pathfinder did the best version of Martial Arts I've seen in a D&D game. Not as good as GURPS Martial Arts, but not bad for a simple D&D game. They would have a hard time accomplishing that in 5E given that feats are optional and you only get a small number.