I think we should make Reaverbots that would:
A. Fit with a theme of a particular ruin
B. Be unique in it's attack on the player
Of course some could be "one size fits all" in that it could go to any ruin, and some might fit a theme, but could go elsewhere without being too out of place. The Frongel (Frog Reaverbot) was an example of a themed Reaverbot, but it could also go elsewhere as a generic Reaverbot, so-to-speak. There was a similar case with the Mammoos (Mammoth/Elephant Reaverbots), but they popped up more because their design better fit the "generic" Reaverbot design.
That, and they made great corridor nuisances.