I forgot to mention, you can wear your current GC PVP gear regardless of the GC you're a mercenary with and get no penalties for doing so. To buy and wear PVP gear from another GC you'd have to transfer, as you currently have to. For clarity, you can only wear the PVP gear of the GC you are *currently* enrolled with.

They could even introduce a new category of Mercenary PVP Gear based on a new lore, or even on the Crystal Braves (but this would require lore changes stating they will happily work with every GC regardless).