Your points are true, just re-looked at the recent WOBs. It’s confirmed that the “Heightening effects” are more due to the amount of Investiture rather than any tie to Endowment. However, this does further confirm that the Dawnshard itself is more than some kind of Command or Intent, and that Investiture itself must be part of its composition. I was only making the correlation because of a WOB where Brandon says that all Investiture is tied to one of the 16 Shards, and there is no Investiture that is not tied to any Shard. Whether or not that tie is relevant is a separate issue, I suppose, as as of yet we don’t see any more support for the theory other than the already-explained Heightening-like effects.
In short, I do agree with you lol. Anyone else have any thoughts?