I often find myself trying to tell people that KISS is a good thing. If something is somewhat complex it will be really complex after a few years and a few rotations of personnel.
Quite often the tradeoff is not between complexity (to cover a bunch of different cases) and simplicity (do one thing simply), but rather where that complexity lies. Do you have dependency fanout? It probably makes sense to shove all that complexity into the central component and manage it centrally. Otherwise it probably makes sense to make all the components a bit more complex than they could be, but still manageable.
