So I wanted to post my opinions of this now that I've had a chance to significantly progress into the game.
The core gameplay of Fortnite is very fun and it's the first game in a long time that felt good just generally 'grinding' content (or really playing in the old terms). That said, the core progression/power mechanics are broken right now. Generally, you can grind out exp for the various cards on missions but 1) they reward very little for time commitment and 2) they aren't always available/useful in the categories you want. So this means there is a huge drive to drop cash on random llamas to get stuff you can recycle for exp/mats.
Secondly, and really the more important issue is that you get so few schematics from the core gameplay loop you might as well just say you can only get them from llamas. They simply don't just 'drop', despite the very ARPG style look system that otherwise exists. Even when you get the weapon itself to perhaps drop, they are often low quality and if higher usually have extremely low durability so they don't last long enough. Even if 'less than ideal' you simply cannot play the game on loot drops alone, you will run out of durability on the items. The llamas themselves are very RNG prone and chaotic. Someone else I play with has gotten literally most of the best weapons in game and I got a baseball bat and a spear in the same amount of 'free' llamas/progression stuff. It's one thing to have this in D3 where you can be missing a critical lego but at least you can grind it out - in Fortnite there really is no way to effectively do this without dropping piles of cash.
Long story short, this game is very fun to play but I wouldn't really put a ton into it besides the $60 edition if you really enjoy the survival/minecraft/fps/arpg hybrid idea. That said the devs have stated they are looking into this, so we'll see where that ends up - the problem is that in my mind if there's no IG way to farm schematics then this game will end up in the dustbin for most people. It simply doesn't reward playtime like it should and unfortunately, let's face it, weapons/loot are basically the essential part of an FPS and a very strong (if strangely absent) part of this game.