Well Stakenet are trying to become the first true DEX run entirely from MN's, this hopefully will give 100% decentralisation meaning nobody can shut it down once it is live no Government entity or even Stakenet themselves. Stakenets MN's are to be the backbone of services and DApps running on the platform the first of which will be the DEX. It is going to have some special features for sure that no other DEX currently has which is why so much emphasis has been placed on the core infrastructure of XSN for example adding Segwit, Lightning Channels, Atomic Swaps, etc. These are all laying the foundations for things to come, the DEX just being one part of that.