The patch note with pachinko orbs is here (and Sylvia and Cunegonde are promoted to 5* girls)
Apparently there will be a specific type of orb for every possible pachinko spin (epic x10 has its own, And I guess it won't be possible exchange 10 epic 1 for 1 epicx10, It's a shame, but I think it was pretty predictable)
The patch note doesn't explain how to get every type of pachinko orbs listed, though: we don't have information on how to obtain Epic draft orbs, Event orbs, Mythic x3 and