Perhaps UA is different, but most big companies I know of don't handle litigation in-house, even if it's frivolous. The in-house counsel are mostly there to hire and supervise outside counsel, and also for general internal advising and policy-making. It has a lot to do with professional liability: companies like being able to sue someone else if there's a legal screw-up.
UA has probably hired a cheap Floridian litigation firm to sort this out on their behalf.