I like the addition of science-fantasy, Jeff—it makes explicit the underlying themes from HPL and CAS while remaining true to their weird roots, and broadens nicely toward Phoenix in Obsidian, Kane, et al, as you intend!
I think that Joe does raise some good points about upping the DM section content about weird science though—even if there’s not a weird artificer/astrologer/tinkernaut PC class, it’s worthwhile to include some new tables of Fortean Times/Rube Goldberg inspiration, as well as some guidance on how you envision the interplay between magic and weird science functioning in the game/at the table.
Allan.