I need to disable a new feature introduced in JIRA 7.6 related to draggin&dropping subtasks.
Reason is that I have a WBS implemented as subtasks and therefore the order is very important, so having them changed should be disabled.
Javadoc has mention to it as a FeatureFlag ( JiraFeatureFlagRegistrar (Atlassian JIRA 7.6.1 API) ) - so in theory you could probably pass in a system property to disable it across the system ( BUT - I would be careful on relying on that since feature flags can be removed…).
I would definitively suggest asking over on the User Community since there will be folks there that might have run into the same situation as user/administrators of the product and might come up with a better solution for you.