The "y" is so unnecessary and out of place. It turns a pretty name into a tacky, trendy-looking one. Plus, the spelling makes me want to pronounce it "sa-brai-na".
Oh, what an awful spelling--replacing the 'i' with a 'y' removes all of it's charm! It looks like it should be pronounced sah-BRIHN-uh instead of sah-BREEN-ah. Please, just stick to Sabrina, which is lovely by itself.
This spelling is practically asking for someone to say: ''Shouldn't that be pronounced 'su-BRYE-na' instead of 'su-BREE-na'''? It looks like a tacky, ugly spelling.
I’d stick with Sabrina.