The developer of Blocknet actually said i n a video that he has spoken to another dex called DYDX and he would really like to incorporate margin into a DEX. The future should be 100% decentralized open source margin trading.
I actually have some idea of how this could be done. But I encourage you to reach out and advocate to developers to check out projects like DYDX and Blocknet.
The most obvious thing that should happen, that people who create decentralized exchanges try to make them easier to use, because right now a new user can't really easily understand how the things are working and probably the best thing is to create decentralized exchange with friendly user interface and make it with extension for browser to make it easier to use, because those website can't be that interactive, but if they create an extension where everything is intructed step by step I think that would be easier to work with it