I'd say give it a shot. C. moori are not piscivores in nature. Konings refers to them as "followers" along with other blue Placidochromis (electra, phenochilus). They follow around a large taniolethrinops who will plunge his head into the sand and excavate large amounts of sand, looking for small crustaceans/bugs, etc. The moori or placidochromis will look for little bits off to the sides that escape the taniolethrinops.
The have small mouths, located at the bottom of their heads, designed for this. Smaller fish maybe, but 2" is probably a decent size to not get eaten imo. However, most Malawi cichlids are opportunistic feeders and may go after a smaller fish if they get hungry.
If it was me, I'd try it out. Throw one in there and see what happens.