Sturdy armor specifically excludes itself from that clarification leading us to need to define what is meant by a "physical suit of armor"?
So a couple questions, if all the physreps being used to provide armor points are considered one suit of armor together for this enchantment; does that mean if I remove one piece of the armor, its considered a different suit of armor, even if I have sufficient physreps for my current armor tag? It'd both no longer be complete item for enchantment purposes and might require a different size armor tag.
In 2.0, we allow layering of armor to make up a suit of armor. If I have a "sturdy armor" enchanted suit of armor, and layer an additional piece of armor over it, does the enchantment still work? How about if I add a piece of armor that covers a previously not-covered location?
Given that rituals that last more than a year include a render indestructible, if layering armor over a suit of "sturdy armor" enchanted armor or removing a piece (like a helm) deactivates the enchantment, does this mean you could offensively (possibly by trickery) make use of this to permanently destroy the suit of armor via shatter? (I found a reference to someone else claiming it had been ruled this would not work; but I could not actually find a ruling saying as much, so I took it as heresay.)
My actual point with these questions is that I think defining a "suit of armor" as a single specific collection of physical reps and not an armor tag is something we should not be doing given the complexity of armor. It both opens up all sorts of edge cases, and doesn't reflect the physical realities of armor.
For perspective, my personal armor physreps vary during an event from 2 physreps to 11 physreps that make up that day's "suit of armor", depending on if I going for 22, 26, or 30 points of armor. With the addition of allowing layering in 2.0, I could see having as many as 15 separate physreps involved in one suit of armor. Thinking of a "suit of armor" as a single item is unrealistic. (You could think of those 3 separate armor values as separate suits of armor, but the 30 point suit includes everything in the 26 suit, and the 26 suit includes everything in the 22 point suit. And the 26 suit is actually 2 different configurations depending on if I'm wearing a kilt.) (In 2.0, I'm looking at armor that varies from 35-56 points, and though that initially will be capped by ranks of wear-extra-armor. ) It feels awkward to me that I might need multiple suits of enchanted armor depending on what my physical limitations are on any given day. (Also, I like parenthetical asides.)