The other field upgrades are neat, but feel rather uninspired and not all that unique to zombies, at least in my opinion.
Mr. Peeks feels different than just a random piece of equipment, he feels like an object of some kind that we've found in the zombies world and that we use to help survive.
There's still honestly a bit of change I'd like to see with the approach of field upgrades, though. For example, imagine if Mr. Peeks was the Super EE reward or if he was unique to Reckoning. Or, at the very least, I don't think you should use the little field upgrade wand to use him, you should just be carrying him around and literally throw him on the ground when you wanna use him. It's a small detail, but helps with immersion a lot.
I don't mind if we have the more generic field upgrades necessarily, but I think we need more of a personalized touch in terms of design and maybe map functionality.