It may have been done before...
But that doesn't mean it sucks. Look at all the Gerudo Valley Remixes out there, for crissakes. There's a good reason something is done over and over again: It's a great song! And you've found a way to maintain this song's excellence. I hate it when someone goes "Ooh, this song is so relaxing, LET'S MAKE A HEAVY METAL REMIX OUTTA IT" or something like that. Don't listen to MetaKnight. This is an excellent remix of an excellent song. Keep up the good work.