Good suggestions. I'll work on adding them to the list.

Some comments on a few:

I would also want to see how many people are currently online on the site.

The devs seem to want to avoid statistic features like this, since they can only reflect users logged into the Steemit.com UI, and are not able to count people logged in through other interfaces. It does not give an accurate count, due to the decentralized nature of the blockchain.

One last feature is to allow history to be viewed entirely, as it is now I can only see my last 20 comments.

I believe they recently made a change for this. Can you try refreshing the site? When you scroll to the bottom, it should load the next 20. (Note - if you have a slow internet connection, you may see a spinning loading symbol for a while before the results show up.)

I wish steemit inc would set up some bounties for some of these features. It's good that it is open source but you need incentives.

Yes, Hive account@ned is working on this.

[Edit] I added integration with the Peerhub marketplace, and suggesting users to follow as new items in the list. Thanks again for the suggestions! :)