I haven't used Steempeak, although I was leaning toward migrating my bookmarks there due to Justin Sun. How that Hive is a thing, I currently plan to phase out STEEM altogether.

I like Peak.network because it can operate as a hub without any specific branding.

If you can adapt your interface to let people cross-post to several platforms at once, that would be exceptionally cool. Imagine a one-click Steemit, Hive, whatever and a tweet, facebook post, and diaspora post at once should people want might be a cool addition. And since I don't code, I am absolutely certain it would be simple and painless to implement!