You really think you can make everyone happy all at once. And you are the very first person that thought of this break through concept...lolThat's a very valid statement. I agree with you but what I would mostly like is a trading platform where a bunch of traders can provide their input on what they would like the most in their platform. I don't want to sound too cliche but basically a trading platform made by traders and made for traders.
Ever heard of open source? Start here ...
https://www.quantconnect.com/blog/open-source-algorithmic-trading-platform/