So right now my game doesn't use textures at all, only vertex colors. However many things would benefit greatly from texturing (e.g. vegetation, clothing). Adding textures means

1. Higher engine complexity
2. Much higher content creation cost

(2) is my major concern.

Anybody got any opinions/advice on this?

@lisyarus If your target platform can handle it then triplanar mapping can be an alternative that could make content creation cost lower, if it fits.
@breakin It easily can, but it doesn't fit at all, unfortunately. A triplanar mapped barrel or hat would look a bit weird :)
@lisyarus Embrace weird! Just gotta find your weird.