These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Teenage Mutant Ninja Turtles (IDW)
Ensemble Darkhorse: Through the reveal of their backstories and their character development throughout the comic, both Alopex and Old Hob have become this.
And then there are Bebop and Rocksteady. Fans are delighted to have them in the comic, and even more so when they are revealed to be incredibly dangerous while still keeping loyal to their dumber-than-a-sack-of-hammers characterization.
Jerkass Woobie: There is no doubt that Old Hob is a complete jerk with violent tendencies and one very deep-seated grudge, but after seeing his backstory, it's really hard not to feel sorry for him.
Alopex applies for this as well, since it's revealed that Shredder wiped out her old pack so that she'd be left with nothing but the Foot Clan. She's only remained loyal for so long because she's been looking for a chance to kill him.
Nightmare Fuel: In #23 there's the sheer amount of mental torture Leonardo is put through before he winds up joining forces with the Shredder.