I don't recall this being discussed by the community at all.
This isn't terribly relevant. Moderators that discuss every decision with the community and only act when they've built consensus fail prey to vocal minorities, e.g., Wikipedia. Then they tend to stagnate.
Instead of trying to build a consensus, Eliezer could have asked the community "Here are the consequences I intend/foresee with this change. Are there any important ones I may have overlooked?", which has no obvious downsides that I can see, other than the opportunity cost of writing out the question.
Has anyone yet mentioned or reported that for the last couple days, the "karma for last 30 days" is showing zero for everyone? And that we no longer can see the top contributors for the last 30 days either?
Do we have an explanation or estimation for a bugfix on this?