Not fun: Explaining to the other half why it's not a good idea to add a Dario dario pair to the tank. I have no idea what's difficult to understand re: them eating shrimplets and occasionally terrorizing the Cories. The funny thing: I was almost convinced to do it.
Fun: Getting the Cories converted to eating Repashy products and my own foods. Yay, no more feeding hassle.
No predation in this tank yet (no babies yet) but I've seen C. pygmaeus and C. habrosus eat shrimplets in my other tanks. Not sure about the frequency, as I still see population growth.
Cherries are prolific breeders but I expect to lose babies in this tank. Maybe not large numbers of them but am prepared for it.
Definitely wouldn't keep shrimp with Cories that large unless it's in a huge community tank with all kinds of hidey holes.
I had a tank that got infested with scuds a while back when it first started. I introduced some cories to the tank and within days all the scuds were gone. I'm quite certain that given the chance, they would gladly snack on some shrimplings. Never had a problem with them and the larger shrimp, though.