In the context of a discussion on the English Wikisource, @BethNaught suggestedthat, in Flow, "posts can be suppressed, but with regard to their history, it's all or nothing - if any revision of a post needs to be suppressed, its whole history must be. Worst case scenario: a malefactor forces the blanking of discussions by inserting suppressible material into each post therein – such material cannot be just reverted and suppressed like in wikitext." Is there any plan to fix this? Personally, I'd like to see Flow used on a much larger scale, but I think this issue is a blocker for many communities.
Topic on Talk:Structured Discussions
It is possible to hide/suppress/oversight a specific post, but not possible (yet) to hide/suppress/oversight a specific diff for that post.
At the moment, there is no improvements scheduled. But we are going to ask communities using Flow about which improvements should be made. Have a better way to deal with History has been suggested multiple times and will be included into that community consultation.
I'm going to read that discussion, thank you for pointing it out! :)