Since I have an ear here, I have to say I hope the EULA doesn't require arbitration in Delaware like the Basic license does. These sort of terms make this a no-go for us - same as when Atlassian required mandatory arbitration in (New Zealand?); out lawyers refused to let us use JIRA because of that, and other clauses in their license.

I'm about to uninstall x-pack for the same reason. Hopefully we can use the 6.3 release, but it will depend on the terms.