Forge Cleric Channel Divinity option to create plate armor in 15 separate pieces. Is this a stretch or misuse of the ability?

I have a player who wants to use the Forge Cleric Channel Divinity option to create plate armor in 15 separate pieces. Is this a stretch or misuse of the ability? It feels like a violation of the spirit of the ability to me.

Spectral Defense prevents stacking with items offering resistance, thus making this much weaker than Uncanny Dodge, oversight?

PHB states new language/tool proficiency takes 250 days. Xanathar ten workweeks, errata?

Does Storm Herald affect any size creature?

Do you have access to Blessing of the Forge every day, or every other day?

Vampire Regeneration vs. Spirit Guardians, what is the order of operations?

How does Life Transference interact with a Life cleric’s 1st and 6th level features?