@hpe "retail" is not one group. There are varying degrees of experience, and some are not any less sophisticated than institutional traders/risk managers.
However, I have found that the more experience a trader has the more he is focused on execution and reporting, and those who are starting out and/or beginners look for number of users. They want to know how many use that platform so they could be in a large group of users. Also, they look for feature rich capabilities even if they don't always use them.
This is typically what I have found, and of course there are exception to every rule.
In my personal opinion, after looking at our questions, your survey will be skewed and may lead you to the wrong conclusions. If you are seeking to build a software, built it for yourself as a trader. Focus on this you would want as a trader, and I bet there would be others that may look for the same features.
Although I worked with retail traders for almost 2 decades, I still listen to each trader to see what they need precisely and what is important to them. Everyone is different.
I hope this helps.