DarkSend is much more superior to stealth adresses.
Yes, in the sense that it is more anonymous. I get that. But wouldn`t it be nice to "scale" your anonimity just like you want it? "Stealth adress" sounds like a compromise. With DRK you can send transactions either completely open or completely anonymously (=darksend), but no "in between" like those "stealth adresses", right?
But what is the point of stealth adresses? Why would you publish it? If a merchant wants to scam you, they will do it with or without proof. A serious merchant will give you a one-time adress where you send the payment to. When the payment has arrived, the merchant is notified. If you need proof, you don't use darksend, if you don't need proof, you use darksend.
Also it's pretty easy to create two adresses, darksend the coins to second one and then send the coins to the merchant if you need to.
I can't really see the point of stealth adresses.