While it's a bit sad I'm not upset by the loss of the dice set.
I got an early access code as an apology, saying it will be active until the game launches. I guess I can keep all the in-game progress I've made once I upgrade it to the full edition when it comes out?
No, I am sorry. All the savegames are broken with every major game update. The reason for this is that the game balancing and important systems still undergo big changes (like spells getting added or removed, changing of how skill points affect the spells you can learn, changing the rules of how and when you can acquire talents and so on). So, I am afraid your game progress will be lost one the game is updated and the savegames are definitely not compatible with the final release.