This may be an odd request but as it stands now there are at least two ways to upvote/downvote a post, either clicking the arrow buttons on the left side of the post or the big rounded buttons on the right side too.
I think for a very minimal, clean and simple look if you could add an option to remove/hide the big rounded upvote buttons. I normally tap the little small arrow on the left so the big rounded buttons take up space.
Please let me know if this is already being worked on or if it’s something you might consider to add in the future I’d greatly appreciate it.
Settings > Appearance > Customize Posts > Show Vote Buttons