When a Season Pass DLC is in pre-purchase mode, you are not required to release at least one DLC in the Season Pass at the time it goes on sale (as you are usually required to do when you launch a Season Pass). However, when the game launches, you will need to release the Season Pass out of pre-purchase–this will entail releasing at least one of the DLCs included in the Season Pass.

I’m not sure I like this part specifically.

This will essentially enforce day-1 DLC. Will it be enough for that DLC to be a simple cosmetic bundle with larger expansions to follow later?
But if a simple cosmetic bundle is enough to count as the included DLC, it kinda defeats the whole point. And, in turn, it might encourage developers to include very basic DLC where they might have wanted to release a series of proper expansions.

The rest sounds great though, with partial and complete refunds for unmet promises.