Finding an old TV and DVD player/Blu-Ray player, a stereo system, Ipod, arcade games, thrown out furniture, assimilating one's self in pop culture, reading books and the newspaper, and listening to people talk from the sewer, and going on missions and observing the human world doesn't turn them into humans? Because that worked in the past and every incarnation of the TMNT.
I understand the idea that they want to be humans or be accepted in the human world, but they do it by their speech, by their mannerisms, the fact that they love pizza, can quote pop-culture, and such. Yes, they have human emotions and go through human problems, but they still are mutant turtles.
I don't see or understand the need to slap clothes on them. To me, the clothes are more concealing of who they are (for example the old cartoon whenever they wore a trench coat and hat or clothes people would say, "Nice costume! Nice outfit!") No one took them serious as a big, walking talking turtles, but someone in a suit or Halloween get-up.
To shed of the clothes, they're more free. They're saying to the world, "I'm a teenage mutant ninja turtle and I'm proud to be one."
It's like X-Men. There's the fear the world, the homosapiens, won't accept them, but finally they're like, "Hey, I'm a human being too it's just I can grow gills or freeze things or read your mind." It's just stepping out the door and saying 'embrace me world.' Look at Mystique for example; she tries to hide her blueness when Magneto thinks she's absolutely perfect the way she is.
I just say just let the TMNT be who they are; not what some Hollywood schmoe thinks they should be because he or she clearly doesn't understand them.