I don't see any issue with these logs. There are 26 upgrade tasks and they need to complete before  the upgrade is complete. CQ62Html5SmartFileUpgrade is one of those steps.I suspect these environment has many many nodes where you it's parsing coz the version purge and other maintenance activities w...

For AEM 6.2, You need to install FP-17061 to get this functionality. Open a daycare ticket to get access to it.

You can create workflow packages from batch processing. See (1)(1) : Starting Workflows

For 6.3.2.2, You need cq-6.3.0-featurepack-24640-1.2.zip . Open a daycare ticket to get access to it. It's not yet available at Adobe Package share cloud.

Can you check the error.log and attach the full stacktrace for this NPE ?

This is already fixed in latest maintenance releases. Please update the instance to latest Service pack and CFP and this should be taken care of.Download the CFP and SP from Adobe Experience Manager Help | Release Notes: AEM 6.3 Cumulative Fix Pack

Go to useradmin, For everyone group make sure you have read permissions to /etc/tags and folder under it.In AEM 6.4, the path for the tags would be /content/cq:tags. You can check for the same permission for the everyone group.

my 2 cents : I understand what you are trying to do here but don't think it is possible OOTB. IMO concept of  CF relies on the content structure which inturn relies on the referenced content(asset, text etc.) which later can be consumed internally or externally where all these assets reside at a cen...

Try hitting the instance with direct host port (http://HOST:PORT/<CONTENT_PATH>.html) and see if anonymous users can access the page or not

AEM (only author instances) with MongoDB only supports replica-set architecture. Sharding is not supported.(1) : Recommended Deployments