marty-harty Hi
marty-harty What about supporting K2ForJ4/5 (like some other providers) with an updated JA K2 Filter Component?
JA K2 filter component supports original K2 extension only, I'm afraid that it doesn't support this J4/5 one.
marty-harty And is it possible for Com content Migration to preserver the item/ content id in order to reconnect exported comments?
As I mentioned above, this extension doesn't support to handle the comment, I suggest to hire a developer to get it done for you.
marty-harty At the moment JA Directory quickstart offers no alternative to the J3 solution, not even in com content. What is your view on that?
In J3, this template is designed to work with K2 content + filter component specific. If you switch to use Joomla articles, you will need to implement an extension supporting the filter feature as JA K2 filter component does.
Regards