Similar to Reddit, Imgur, e621, etc, there should be an upvote/downvote system that is completely separate from faving/promoting. There's this void between commenting and faving/promoting where you want to support what you've seen/read, but don't want to leave a comment nor have it saved forever on your profile. Plus, this would help relevance sorting in terms of upvotes rather than just views/clicks or whatnot that you use now.
Same thing for comments, so if someone bashes an artist like an idiot they can easily be downvoted, or if someone gives great criticism, it can be upvoted.
Customer support service by UserEcho