So they explained how D&D caster multiclassing works with spellcasters. Not how they changed it to give higher level spells known sooner, like the lead systems dev said earlier. Neat.
I don't trust Larian to understand why a Cleric 11 / Wizard 1 casting Disintegrate or any other Wizard spell is a horrible idea. How else would they change it?
Maybe add half the level of another full caster to determine spells known? Cleric 8 / Wizard 1 gets Fireball. Cleric 10 / Wizard 2 gets 6th level Cleric spells and 4th level Wizard spells. That's "sooner" but it would be more complicated than D&D and I don't see them doing more complicated. And even that would be very exploitative and make the best caster some weird Wizard / Cleric combo with a dip in the other. Or a 6/6 for 5th level spells from both lists.
So I think, better to not tamper with the system at all.
