I think the default assumption should be that the next release will be a minor release, not a maintenance release. If someone wants to do a bugfix-only release, they can create an extra fixVersion at the time.
E.g. when you’re releasing REST 2.18.0, the next version should be 2.19.0, and you’d only create a JIRA version for 2.19.0.
The maven release plugin does not do this by default (e.g. when you release 2.18.0 it defaults to 2.18.1-SNAPSHOT), but maybe we can get around it with this flag (I haven’t checked how), or in our bamboo release plans.