So player A gets, 1(450 frags per day+1CC)from their 1 moonstone set and player B gets 10(450 frags per day+1CC) from their 10 moonstone sets. It seems that some of the players are still allowed to outsmart the game while others are not. Both players can craft the same amount of CC in the MA and both will get similar frags from climbing the spire, (rng averaged over time.)
10CCs is not at all similar to 1CC and 450 frags is nothing like 4500 per day when it's time to craft. Yep. I definitely call it punishing new players.
It's the same with anything. Back in the old days, people could get more than one fire phoenix or brown bear. Those were game changers and I really really wish I had more than one. The longer you play in a game, the more likelihood that you'll have something that new players don't get.
Let's think of a scenario ... Inno allows the Moonstone library set in multiples for anyone. They take far, far, far too long to realize that it's causing a huge imbalance in scrolls, as Sami said. Now that they realize it, they know they must somehow limit the moonstone set. They stumble into one idea, "well, we'll just let every new person only have one." Then they find out that wasn't quite working either, because there is still an imbalance. So then they get the second idea, to change the goods. That's the one they should have done to begin with, but by then it's "oh well, it's sorta fixed now, so let's just forget it and move on."
You may say that they should have allowed people to keep getting multiple sets but just had the second solution first. You're right, but I honestly believe they didn't think of the second solution when they did the first, and now that they did ALL the code work in limiting the moonstone and switching it over to the MA, they just don't want to mess with it anymore. So that's why they won't do that.
You may also say that they then should have taken away sets from the older players and only allowed them one. But think about it ... if you had poured diamonds into the spire for the sole purpose of getting more moonstone libraries, and worked your butt off because you were really going for those, how would you feel if they were suddenly taken away? What kind of compensation could Inno provide, not knowing who destroyed their stashes going for moonstones and who didn't? I think that would be more of a nightmare and it might even be illegal, if people bought diamonds to go into the spire to gain moonstones.
I know it sux being a newer player and not having those great buildings in multiples. But think of it this way. There are things you are getting now that new people 2 years from now will probably say, "Dang, I want that and they don't give them anymore. It's not fair." I'm not trying to belittle the pain; I'm sorry for it. But it is what it is.