The episodic format is a mild negative in my view, because it brings up potential worries of a mid-game/series quality shift (if staffing changes, or some other factor (attempting to adjust to audience feedback, rushing to hit a bi-monthly deadline).
I don't mind Wolf Among Us, Walking Dead I find completely unengaging, though thats probably the source material as much or more then Telltale. The whole "Apocalypse came, and suddenly everyone in the entire world became a dick" trope-collection is in full effect, and way too played out nowadays across every media form.