This is a really passive-aggressive weaselly phrasing. I’d recommend reconsidering this type of tone in public discussion responses.
Instead of suggesting that the other complaints were invalid or illegitimate, you could just not mention them at all, or at least use nicer language in brushing them aside. E.g. “... the main actionable complaints...” or “the main technical complaints ...”
* * *
> [...] I certainly don't think that this is a major complaint at this point. [...] it's hard to consider this unaddressed [...] fixed
After reading the original post and your responses, I think the responses come across as pretty smug and dismissive.
Third-party readers would probably be more optimistic if you just left it at “we’ve made a lot of improvement since then and we’re still working on it” or similar.