I hesitate to give an actual star rating at the moment since I know it is heavily WIP, so do not think this will be my final opinion of the pack.
The main thing I want to point out is the fact that it is actually pretty easy to create a quick map with a few challenges here and there in ZB and UZB, but it should be noted that to turn these into high quality maps with complex layouts and high detail is going to require a lot of time. For now, these maps feel like sketches designed to serve as a base, waiting for those details and more granular challenges and pathing to turn them into a fully engaging zone.
My advice then, take what you have and just refine them over a long period rather than having a focus on pack length, because at the moment there is not a lot to do or look at other than just run and maybe stumble on a few emblems.