I remember when I was in High School I picked up a book on drawing anthro characters. I was always fascinated with drawing- and something about anthro's just drew me in. To be completely honest there was nothing creepy about my fascination, after all we think goblins, demons, elves and all other fantasy creatures are awesome do we not?
It's one thing to delve into art for the beauty, its another if its a more "personal" nature. Either way, neither one really crosses realms with the other unless you yourself go that route. If you don't like anthro's getting jiggy with it, keep you clean filters on.
Now as for Equestria girls- I think they made the change quite tastefully. They didn't make the world too human and the characters personalities were almost spot-on. Aside from that, it gives us humans ( ), a few ideas on how to create good costumes for BronyCan and BronyCon.