I gotta say, I don't usually listen to NG house, since I like the OLD house music, but I'm glad I clicked on this one. This is a pretty stand up (although pop-dumb, but I do pop-dumb stuff too) house song and having live vocals is something you don't get in a lot of electronic music, much less on NG.
Your piano melody on the right pan should variate or drop out at 00:49. It doesn't fit there. In fact some variation in that melody PERIOD would be a good idea, especially during the verses, but then leave it the way it is during the chorus.
Mix wise... Pretty great, fitting for house. Might cut a little of the low freq on the piano reverb, though (hearing reverb of hammer sounds in the left pan). Push your bass up a bit in volume as well.
You have a good sounding mic. What is your set up?
The panned delays on the vocals are pretty sweet. Your voice sounds like Jimmy Urine mixed with Daman Albarn and considering they both do electronic music this is a good thing. (Do a cover of Park Life :P)
Overall, it is as you said, "a mediocre single," but we need more singles with live vocals on them here.
Good work.