Note that a PR is not even required, just a design that gets concensus.
Showing us “screens that look ugly” is a nice way to start a conversation, but something will only get done when there’s a candidate design that fixes it which anoek agrees with.
Since the (recent) OP is UI designer, I look forward to that with hope. It’s fair for me to say this, because I’m likely (better than 50/50?) the one who’ll implement it 
(FYI here is the most recent example of how it worked).