We should definitely update the library and detach it, rather sooner than later. Otherwise the next CVE in Apache Mina may make our life very fun.
Since we had a new LTS cutoff recently, it is a good timing for such change.
Some notes about Apache Mina update to 2.x:
I definitely support a two-stage update when the first plugin version uses old Apache Mina.
Best regards,
Oleg