I think what should also be considered is the curation system on contents... because there are really newbies out there with bombastic contents and who voted for big whales as their witnesses, use hashtags like original-content, etc and yet they are not curated properly by the chosen witnesses and just get 0.10 SBD from other users.
To change the UI into USD might help..but when witnesses failed to curate great newbie contents then noobs will be reluctant to spend so much time to create posts.