They actually had an episode with a whole colony of liberated Borg. Unity featured the survivors of a destroyed Cube that had their links with the collective severed, adapting to life as individuals again. Unfortunately (or fortunately, depending on your perspective) they chose to re-establish their own link and reform themselves as a cooperative, with less nefarious intentions than the Borg themselves.It would have been interesting to see OTHER liberated Borg and how they cope.
Didn't the VOY writers already do that with the liberated Borg children on that show?