... If you have some mid-tier wildlands that needs clearing before you can settle, then you wouldn't be able to settle it with pioneer spam, and the really tough wildlands would only be settled late game. So the world basically breaks into "starting zones" with maybe 1 guaranteed expansions, and tons of wildlands of varying difficulty....
Isn't that what monster lairs are right now, mini wildlands? But yes, I wouldn't mind if most of the map was blocked initially (without completely boxing you in).
If all you do is make pioneers really hard to make, all that ends up happening is that they become juicy targets that will make or break a game. Perhaps a player might be able to manage to cope with that, but I have a feeling that the AI won't be able to (it certainly can't right now). Then, of course, you'd have to figure out a replacement method for outposts.
Well yes, they should be valuable targets, not the dispensable cannon fodder they are now. The AI should be able to cope, games like Civ have far more costly pioneers, and they make it work. If the AI can't deal with it so pioneer spamming is the only way to make it competitive, than would be a major flaw in both game design and AI programming imo.
@dalekdan, I'm not really sure what point you are trying to make? First you say having to clear out monsters wouldn't work because the AI would move in, and then you suggest exactly the same thing. Also if some changes were made to pioneers, for instance like I suggested, the AI wouldn't have 3 pioneers around just waiting for the monsters to be cleared. As for the shards/mana, if it becomes harder to expand for both the player and the AI, it would still be balanced; you couldn't race for the shards, but the AI couldn't either..