There is no dedicated feedback forum for game features.
https://forum.square-enix.com/ffxiv/forums/663-Feedback
You can't post in the top level of the forum, and the three subforums are obviously unrelated to the game. There is a forum for posting bug reports, but since "my WoL looks different" is within the bounds of what they said would happen with this update, it would not be a bug. We could try our luck posting reports pointing out everything that changed but that would just get them moved to "Not a bug report." I've seen people suggest running complaints through Google Translate and posting them to the JP bugs section and it honestly reads like satire.
Speaking of, I've heard it both ways whether or not the devs consider feedback from non-JP sources. But I don't speak Japanese and I'm not going to run everything I say through a translator knowing full well it'll come out unintelligible.
Also, it's clear that they listen to feedback from somewhere, although frankly it's most likely just a roll of the dice that they see specific posts show up in their Twitter feeds. Like, how the hell did they catch wind that people with hole-phobia would get the heebie jeebies from the SGE icon??
Anyway, I'm under no illusions as to whether this thread will be seen by devs, which is why I'm not addressing the devs but the forums as a whole. I made this thread because it's become clear that too many people are taking the wrong approach by simply posting about how their WoL changed.
If we want our WoL's unique features back, we need to propose solutions, and the only feasible solution at this stage is to introduce more customization options.
I want to see the theme of criticism shift from "revert my WoL" to "add new customization options" because frankly the former is just not gonna happen. Criticizing the changes without offering a workable solution is as good as just whinging. So again, I don't think the devs will see this thread or even get a summary. My hope is that someone who sees it will learn from it and post something on Twitter that a dev then notices.