Larian messed up by not communicating early enough about the deal with Linux. It sucks for those users that it's gotten delayed this much, but I think at this point they've done the best they can. You can get a refund, they've apologized, and it's being released for the EE. It would make no sense for them to release D:OS AND the EE as a linux version. I'm not sure what else they should do? They shouldn't delay the KS just to appease 3% of their customers. (And really, would delaying the KS till after the EE really make Linux users feel any better? There'd the same delay. I suppose Linux users would finally get to play the game and might be a bit more inclined to go for D:OS2 if they knew Linux would be there from the get go, but I dunno.)
Maybe a nice gesture would be to release the EE for Linux a couple days before the other versions, though I could see that not really making sense financially either. It'd invariably annoy non-Linux users. Another idea might be to offer a discount for linux users who pledged for D:OS who want to pledge for D:OS2, but I'm not sure how easy that'd be to verify? I assume you ticked some kind of "linux" box or something for the OS you wanted D:OS for.
Heck, if Larian really wanted to make it up for Linux users, they'd offer D:OS2 to them for free. That'd really be a sign of good character, though their investors might not like that idea.
I don't take issue with the fact that Larian is running late (though the why of it, maybe, but the details are so spotty that that's guesswork to say the least), I take issue with the way Raze (and some others) are trying to downplay the concerns some have.
Imho they should make sure the Linux EE (or a beta of it) is out before the D:OS2 KS. Announcing the new KS before making sure previous promises have been fulfilled was, imho, already a very bad move marketing wise.