First of all, I can't know or say in SE's case. I just have a limited scope from experience from another company.
Second, feedback is a very broad term and I'm not sure if what you may be suggesting is something that is actively sought by the team to begin with.
What comes to mind when I see a player mentioning feedback being directed to devs usually comes off as armchair development. Things like where players are under assumptions that BETAs are meant for players to input what they like and don't like to developers when most of the time BETAs are being used to stress test servers and having players interact with systems and see if they come across additional bugs that need fixes that in-house testing didn't turn up.
This is also not assuming that posters don't try to make community reps answer for the developers (IE: "Mr. Community Rep, explain to me XIV's decision for _.") as they [probably] aren't privy to that information, or in the very least, able to communicate reasons to players as NDAs are a thing.
However, that doesn't mean feedback doesn't reach the devs. We've gotten items and changes from players before, but it's generally things that community has agreed upon through tons of replies (not necessarily threads; JP forums tends to keep threads with topics very concise while ours are often new thread spam).
In terms of 'feedback on something that a huge chunk of the community has an issue about,' this is a grey area. While companies like SE probably want player feedback, there's a simple fact that often gets overlooked in your statement. A 'huge chunk of the community' is not something players can actually identify as perspective is often skewed. SE would, however, be privy to information like engagement rates, clear rates, longevity of the content, push-back from players across all demographics and regions. Players tend to surround themselves with like-minded players and it can end up being an echo chamber with a perception that something is much worse, or better, than is actually is.
TL;DR:
Feedback does get back to the devs, but it's largely stuff that gets universally agreed upon by all regions.