We should put all possible changes/reforms in a big list, that everyone can upvote/downvote, agree disagree.
EA is governed but a set of core EAs, so if you want change, I suggest that giving them less to read and a strong signal of community consensus is good.
The top-level comments should be a short clear explanation of a possible change. If you want to comment on a change, do it as a reply to the top level comment
This other post gives a set of reforms, but they are a in a big long list at the bottom. Instead we can have a list that changes by our opinions! https://forum.effectivealtruism.org/posts/54vAiSFkYszTWWWv4/doing-ea-better-1
Note that I do not agree with all comments I post here.
They'd have the information of upvotes and downvotes already (to calculate the overall karma). I don't know how the forum is coded, but I expect they could do this without too much difficulty if they wanted to. So if you hover, it would say something like: "This comment has x overall karma, (y upvotes and z downvotes)." So the user interface/experience would not change much (unless I have misinterpreted what you meant there).
It'll give extra information. Weighting some users higher due to contribution to the forum may make sense with the argument that these are the people who have contributed more, but even if this is the case it would be good to also see how many people overall think it is valuable or agree or disagree.
Current information:
New potential information:
e.g. 2 people strongly agreeing and 3 people weakly disagreeing may update me differently to 5 people weakly agreeing. One is unanimous, the other people have more of a divided opinion of, and it would be good for me to know that as it might be useful to ask why (when drawing conclusions based on what other people have written, or when getting feedback on my own writing).
I would like to see this implemented, as the cost seems small, but there is a fair bit of extra information value.