I feel like people are a little too worried about this....I think it sounds fun so far~
Personally I don't mind changes much as long as it's done well, plus the art style is bright and energetic! I'm just hoping it's not Flash animation (I don't usually mind Flash like MLP but for an action show I like the animation to be more loose)
I can see why some of you guys are cautious about it but, I feel some complaints are getting a bit nitpicky imo.
I get that everyone loves TMNT here but I feel some changes deserve a chance at least.
If it stinks then you can dish out the "I told you so" but if it doesn't then it's a pleasant surprise~