Huh. Missed that button.
Anyways, after poking around with Immersive Engineering's splitting conveyor and finding out that it handles hopper-inserted items a lot more consistently than hand-dropped items (when I tried the latter it almost always pushed everything in the same direction), I ended up going with that.
On a related note, my Botania tree/munchdew farm is a mess. A hilarious mess, but a mess nonetheless.