Abandoning the XP changes and fixing the issue with randgen makes two instances where they rethought something or at least fixed a bug. Vs who even knows how many times feedback was ignored. However, you are correct, that's more than zero instances. I didn't really follow that one because I tend to kill every single mob I see for the kill bonuses anyway, so it wouldn't have affected me.
To be fair, it's at least encouraging that the these two examples are both fairly recent. That and the shift to minor adjustments to trees instead of waiting until they have time to completely rethink one top-to-bottom are both certainly welcome changes in development style if they stick. We'll see.
Saltmarsh saw two major changes to its loot due to player feedback,
It had 1k sentient exp added to every chest's drop table because "heroic items dropping in legendary means the quests are really bad for feeding your weapons" and eventually got the heroic items replaced with legendary ones anyway due to feedback.
Multiple set bonuses have had their values made consistent due to player feedback, many of the recent balance adjustments have been longstanding points of player feedback such as archmage Arcane Blast and Bolt being undertuned, the entire moving imbues up to 1d8 (then nerfing them to 75% scaling) is because people constantly complain the class they're playing has a worse imbue - that one kinda monkey pawed.
This entire overhaul to weapon W scaling? Did you SEE the feedback to the Fire Over Morgrave weapons? A lot of it, including my own was that it's almost impossible to see us replacing Attuned Bone Weapons for years unless future weapons just do more damage.
And now weapon damage is going to get a little bit higher with every single level just to ensure there's at least some reason to consider an upgrade.
Feedback is used a lot more often than we as players tend to give credit but typically the ones most vocal claiming feedback never gets used
probably aren't paying attention to the feedback of others and
probably don't give the greatest feedback themselves.