Remove Voting on Post or Comment
Sometimes accidentally we might vote on any post or comment which we don't want to. Now current voting system is irreversible, so either we have to leave it as it is or someone might prefer to down vote it later on. (depends on whatever they want to prefer)
How about to have a remove vote option by clicking on it again? For both, upvote and down vote on post/comment.
Editing Notification on Post or Comment
After 1st trial, we might need to edit our posts or comments later on to add more into it or to correct some spell errors. But those who already voted on that post/comment don't get any notification for it afterwards. Even if it gets a major edits on it.
How about to show a small label of "edited" (like in discord) or a pen symbol (like in telegram) on posts/comments? And send alerts to those who voted on it? So they can decide to keep their vote on it, change it to remove it if it gets a major edit and they don't want to keep their vote ideal on it anymore.