If I use the internal market (I don't use external exchanges), then I'm only interested in the internal exchange ratio of Hive:HBD. For that the internal market is good enough imho. I would be more interested in transparency: insight to orderbooks and a user specific trade history accessible at least via an command line API.
And while we're talking about ideas: a long term trading volume graph together with a long term exchange ratio graph would also be nice to have.