Edit: obligatory explanation (thanks mods for squaring me away)…
What you see via the UI isn’t “all that exists”. Unlike Reddit, where everything is a black box, there are a lot more eyeballs who can see “under the hood”. Any instance admin, proper or rogue, gets a ton of information that users won’t normally see. The attached example demonstrates that while users will only see upvote/downvote tallies, admins can see who actually performed those actions.
Edit: To clarify, not just YOUR instance admin gets this info. This is ANY instance admin across the Fediverse.
You are the person who has a problem with that and you mentioned FOSS. It is easy to complain. FOSS gives you the tools to change things. But you have to put in the work. You are the one putting the burden the change something to your liking on others instead of doing to yourself.
Both of your ideas are not compatible with ActivityPub as far is I can see. So you first need to change the specification and then make everyone adopt the specification. Before that any change would make your software incompatible with the rest of fediverse which is counter the idea.
And all of that because people could be mad about a downvote. I am an instance admin. I was downvoted before. I never even thought about looking up who downvoted me. I know people are different but to be honest if someone looks it up and harasses you then you block them. And I really can’t imagine that your vote on a post with a pseudonym is really a very useful datapoint for anyone.
I agree that these things have to be communicated better but I don’t even know how we would make people aware of this. No one reads disclaimers.