The package manager has been deprecated in favor of a Software Distribution:https://experience.adobe.com/#/downloads/content/software-distribution/en/general.html

In case you have Adobe Analytics, you can employ AEM page insights https://docs.adobe.com/content/help/en/experience-manager-64/authoring/page-performance/pa-using.html 

The support case remains opened up until we get a confirmation from the engineering team, that the code fix will be a part of the scheduled service pack. AEM Product Update Releases Roadmap can be located at https://helpx.adobe.com/experience-manager/update-releases-roadmap.htmlA service pack releas...

Allowed templates for experienced fragments should be set for XF root folder, for example at /content/experience-fragments.You need to define cq:allowedTemplates property as Sring[] and set all available templates there, example:/libs/cq/experience-fragments/components/experiencefragment/template/co...

From the author package manager, you need to replicate packages that were deployed via maven. 

There are many ways to achieve your requirement. If you need to redirect all pages, you might want to do that activities son Apache/Dsipacther level.If this is for some pages only you can employ Vanity URL field on the Page Properties dialog 

Another option is to create a package of your site with all dependencies and replicate the package itself from the Package Manager

Try to force clientlibs to recompile within your new changes:https://helpx.adobe.com/ca/experience-manager/kb/How-to-force-a-recompilation-of-all-Sling-scripts-jsps-java-sightly-on-AEM-6-4.html

org.apache.jackrabbit.oak.cache.CacheLIRS - is not an issue at all.I suggest opening a support case and share thread & heap dump along with log files

Check if this sample helps: path=/contenttype=cq:PageContentgroup.p.or=truegroup.1_daterange.property=cq:lastModifiedgroup.1_daterange.upperBound=2017-04-21T23:59:59.000-04:00group.1_daterange.lowerBound=2017-04-21T00:00:00.000-04:00group.2_daterange.property=jcr:createdgroup.2_daterange.upperBound=...