How can we use 800 armor and not break pvp?

For those who don't follow patch notes, there's a new engineering enchant for gloves in 3.1. Adds 800 armor to gloves, usable only on plate. Presumably, it's to give tanks a perk while preventing engineering from being even more attractive to cloth pvpers.

It's too late in the game for big changes, so let's focus on something small and attainable.

How can druids (who already are cut out of the parry/threat glove enchant) use this enchant without making it attractive to pvpers?

Some thoughts:
1. Is this a problem? Most would prefer the rockets or the haste for pvp anyway.
2. Perhaps limit it to leather and above? It's appealing to cloth users, but a lot less so to leather pvpers that focus on burst instead of survivability.
3. Make it a proc instead of a passive. 100% uptime, long duration, but medium/low proc chance? That means that it's just as good overall, but won't nerf burst damage.