msc DEx solves BTC/MSC exchange nicely by having it only on the sell side, so msc price will only go up and up since nobody can dump it on DEx, much wow
MSC DEx only has the sell side, I think that it's a nice idea to solve the matching based on sell orders and buy orders automatically.
This strategy won't work when there's high volume: multiple users can choose the same order. Orders overlapping is a big problem.