Thank you for playing and thanks especially for posting.
Definitely going to think about everything you've written. I've actually been working on CW the last few days (and enjoying it). I think I've already fixed the tute bug you mentioned.
Corpses as a resource: yes I should run with that. Currently you can make your heaviest tank unit out of flesh. Brains are used for food by ghouls (which are rare, or did I even take them out entirely?) and hungry dwarves which I never play with. Brains also makes life essence which upgrades your wizard's spells. I've recently added turning life essence into spawner skulls - so if there is no spawner rock(marble) nearby then there is still a way to make barracks.
I definitely need to expand on the wizard spells & maybe provide alternate wizards with different abilities to play the game with.
Currently working mostly on the random maps: including adding a 'clear path to portal' challenge option: where you don't start hidden: you start with invaders spawning almost immediately - that's spiced it up a bit.