I was a little weary of the cult of zombie, just because whenever the masses around here get so uniformly behind something it inevitably turns out to be stupid.
But I have to admit, the answer to your question is probably yes.
With ZY they have a distinctive, unified artistic vision, kind of like Gottlieb did in the 50's-70s , when they basically had 2 guys do the art for the majority of hundreds of pins. It's a good idea to have a cohesive look to these games, with well-drawn, creative, and immersive artwork that people will instantly identify as a Stern pin.
I think with the amount of licensing they do, we are still going to run into photoshop disasters like Game of Thrones, but maybe the success of these hand-drawn art packages will make Stern a little more selective of which licenses they put into production as well. Clearly, some licensors are going to be more amenable to artistic freedom than others.