What you refer to as "rho-rotation" is just a specific kind of metathesis. If you search for "rhotic metathesis" (or something similar, perhaps "liquid metathesis" or "r-metathesis") you'll find plenty of discussion about this phenomenon.
English has quite a few instances of rhotic metathesis from Old English to Modern, eg:for example
brid->bird thrid->third hros->horse
- brid->bird
- thrid->third
- hros->horse