As far as i understand, all Forum skins so far are rather message board than forum: each additional comment is lined up in cronological order. One can not comment explicitly to an older comment - or better: a reply to an older comment (older than the last) is not lined directly related to this older comment as for example shown here:
https://mylittleforum.net/forum/index.php?mode=thread&id=11793

My first question would be: is it very complicated to integrate such a feature in the new version of forum skins? Have a 'post reply'-link in the footer of each comment and then document/list such replys directly under the relevant comment?

The second related request might be more complicated: would it be possible to add as feature a threaded show content .. similar to what mylittleforum provides?
see: https://mylittleforum.net/forum/index.php?mode=index

Such a 'real forum' with both features, i mention, helps a lot in discussing things as refering to arguments directly often is important and more helpful than droping statements not related visibly ... to my experience an important point of discussion culture.