No, because that would be retarded.
I wonder HOW the devs can justify going through an entire set of stat changes, and the removal of Armor Penetration, and then just give 100% armor pen to Warriors with 30% uptime. They went to the trouble of removing it because too much ArP was overpowered, and then turn around and give a class complete armor bypass 30% of the time?
I guarantee you the guy who made the final decision on THAT one also made the decision to gives Mages bloodlust.
The decision to remove armorpen as a stat is because as a stat armorpen is overpowered. It simply scaled at a much different rate than any other stat, with a wildly different scaling from spec to spec. So you'd have some classes/specs who scaled absurdly well with it (Warriors, Ferals, Combat), while you'd have others who got nothing out of it. As a stat found on gear, this isn't desirable because it makes a large chunk of the drops available in a tier useless to some specs, and other specs who won't take a piece without it. That is the primary way in which armorpen were overpowered.
100% Passive armorpen in of itself isn't an overpowered concept. See: Every caster in the game who has no damage mitigated by armor. All it takes to balance that is to lower the damage to the point where the unmitigated damage is in line with others' mitigated damage. Similarly, any passive amount of armorpen in between is fine, as long as it's accounted for in your base damage.
What's bad is having one stat worth more than other stats, because gaining more out of a given amount of itemization is the source of scaling issues, and the primary reason Fury went from terrible to amazing within a few tiers of gear.
The current implementation of colossus smash faces a different problem though. While it is capable to balance around 6 seconds of awesome, particularly in PVE it's not too hard to do, it does give the class a very distinct feeling of lacking when it's not up. In order to balance warriors doing so much damage during the time CS is up, we must by necessity do a lot less while it's down. This results in us feeling weak 70% of the time in PVE, and makes us a non-threat for that same amount of time in PVP, while at the same time making our burst during the 6 seconds of awesome potentially too strong, surpassing even what we had in 3.3.5 with 100% armorpen, and coming with no cost to resilience at all (where to get 100% armorpen via stats you were giving up a lot of resil, due to no arp itemized pvp gear)