Absolutely right, there is no middle market.
BBG/Reuters/CQG is at core about serving a finite number of LT customers and is about reliability and backup servers as much as it is about features.
Retail is all about serving a high turnover client base and having the right indicators and features to attract retail and spending on marketing to replace subs lost to a 95% turnover rate. Also about front end loading and selling add ons while the new sub asumes it is nothing compared to the money he will make.
As noted, equis quotecenter looks to be a very good compromise, just need a way of getting the data into other charting platforms. Any ideas?