I'm actually not enjoying this now. Nine times out of ten my civilisation has no access to iron, copper or any useful metals at all, and 90% of the world map is either barren or full of something useless like Bismuth.
It's just... it's not fun anymore. There's having a challenge, and there's being kicked in the balls over and over because fuck you player. And that's what this is. And why are we suddenly not allowed to know what sort of stone will be on the map? Why did we need that taken away? Now it's even harder to get the materials you want. Now what if I want a Microcline fortress, or Sandstone pyramids in a desert? Nope, sorry, you're not allowed to see until you get there now for some utterly arbitrary reason! And good luck trying to survive long enough!
tl;dr Metal now being incredibly scarce has made the game unfun for me. Now it's a choice between 'Go to that biome you want, that MIGHT have the stone you want, oh but you won't have any metals' or 'Fuck you player, go here if you want to actually get anywhere, you have no choice in this matter anymore'. This isn't fun, this isn't even Fun. It's just frustrating, and I see no way metal being so scarce can be good.