Sorry you got flamed homey. Everyone says shit they don't REALLY mean. Characters can change, just look at Jax. I don't think anybody really wants Jax without the robo arms. Plus, it becomes a different story with dudes like Stryker, where practically EVERYBODY wants a change.
I mean, I have my own gripes about characters changing over the years, but ultimately, it's not my baby. As much as fans like to say Mortal Kombat belongs to them, it doesn't. I feel lucky that I'm a fan of a series that makes a sincere attempt at catering to us, but also tries new things.
My thing is, it's less about 'ninjas' so much as Lin Kuei members. I believe the only playable ninjas who were from the Lin Kuei were the cybernetic robos, the two Sub-Zeros and Smoke. Now, other members include Frost and Sareena (now anyway). Those are two characters I personally wouldn't mind seeing automated. It'd be an interesting twist on their stories, would make some kind of sense, and would be unprecedented in a 2D style Mortal Kombat. Plus, it'd be kinda cool to see a lady cyborg.