It depends on what you mean by 'quality'. What Steemit needs is compelling posts that attract a big audience. It needs some big names who will bring in their fans. It seems if you are famous enough you can post any old crap :) What it doesn't need is people posting memes they copied elsewhere and then buying votes for them. That makes it look bad.
We really need content that people cannot get elsewhere. Persuade some celebrities to sign up and do some exclusives. The issue for the really big names is that it's too small an audience right now, so we have a chicken/egg issue. Maybe it can work if we can get more talented people who don't make much else elsewhere. If they each bring in a few hundred fans then we have the start of something.
We have Trending. Maybe we should add a Recommended tab or something like Editor's Picks, like what you may see on some websites. Maybe Steem could have a trending section that is only that from human curation combined with total amount of comments and views perhaps. Maybe, there should be more filters, a better search engine, more choices, to help users find what they want to see, follow, etc.