First, as to the Monster Manual for DCC, I'd like to see one. I'll bet it would be easy enough to do two things:
(1) Stat out some "classic" monsters from Tolkien and other literature like that.
(2) Go through old modules and use the best of those.
While the "each monster is unique" flavor appeals to some, having some go-to monsters would appeal to others.
My friends' kids are getting the Pathfinder Beginners Box instead.
The rulebook assumes familiarity with RPGs. The presentation is sophisticated. The entire atmosphere of DCC RPG, the themes, the aspects that make it stand out among RPGs, might be confusing to a newcomer. It strikes me that people might put the rulebook down and just pick up something that is clearly aimed at new players. DCC needs a "beginners box" suitable for beginners and kids....
I agree that a "beginner's box" would be a nice thing for DCC, however...
I learned D&D in the 1970's when I was in middle school before the Holmes Basic D&D was invented. The rules we learned from are thought by many to be obscure and confusing, yet we had a lot of fun with them. The best way to learn how to play a RPG isn't by reading a beginner set, but instead by having someone teach you in person. The rules become more like a textbook, where you look up things when needed, instead of a guide that tells you how to roll dice. I taught my three children how to play RPGs and now am teaching a friend's two sons, and they have had a blast playing characters. (My friend's sons have played DCC and love it, by the way, although I'll confess that I don't use every rule in the book.)
My point is that DCC needs mentors as much as it needs a beginner's set. While I think that the Pathfinder basic set is by far one of the best starter sets I've ever seen, I don't like the Pathfinder RPG much and feel that giving a set like that would be counter to my goals as a game master. Why give them one game and teach them another? My philosophy is more of "fun over rules" and Pathfinder is the opposite.
Just one guy's opinion.