Thank you for your sharing and suggestions. I would like to give you more details about our plan for JA Blockk template.
1. K2 Support: as you can see, Joomla content component is now much better, it supports extra fields and more.
And for its limitations like author page, media, we have solutions in the template. There will be author pages coming in the next version and video, media content types will be supported at core.
An other reason is that, using Joomla content component, it will be easier to upgrade when Joomla 4 stable released.
2. EasyBlog support: we will check this, to support more 3rd party extensions, we will need to support the extensions on JA Content Listing module. This is in our plan but it will take time and effort 🙂 We will have updates for each version release.
Thanks again for your sharing.