Maxperson
Morkus from Orkus
Well, from the posts there are only a few who were at least vocal in expressing a similar interpretation, and more who read it as I do. I think from the video the intent was clear and if you want to rule it differently of course that is up to you. But as I said, that is neither here nor there.
Again, I am asking for a concrete example of exactly how it would work to you. You can only swap a spell of the same level. So, when you first use it that is the spell level you are locked into, right? Are you saying you can swap that spell with any other of that level?
Example:
My sorcerer knows Charm Person and is going into a combat-heavy assault, deciding Magic Missile would be more useful. So, after a long rest he swaps out Charm Person for Magic Missile.
Does Charm Person become the swap spell, or Magic Missile?
Later on, he wants Comprehend Languages. Can he? Does he have to swap back for Charm Person first, and then swap again for Comprehend Languages? Can he go right from Magic Missile to Comprehend Languages?
Or are you basically saying he has X - 1 permanent known spells, and one spell he can swap for any other spell of that same spell level once he decides to use the feature?
You can only swap a spell of the level you first use it on. If you swap charm for magic missile, then you have to swap magic missile next time, since that was the spell learned via the feature. Next time since you picked up comprehend languages via the feature, you swap that one out.
If he waited and used it for the first time on a third level spell, he would be swapping through spells of that level.