As someone who spends a lot of time doing Transmog I realized the other day that pvpers get access to their own special sets/colorations that are only out for a limited time. I'm not exactly sure how that makes much sense when pve doesn't have the same restrictions outside of a few special cases. You can go back months/years down the line and farm up transmog from LFR to Mythic. The equivalent for PvE would be like Mythic sets/trasmog being unavailable after the next raid tier comes out. This doesn't really occur in pve, people who pvp can always go back and farm raid sets for t-mog so I'm just curious as to why people that partake in pvp get special sets that only they can get and only during a specific window.
Keep in mind I'm not demanding they change the system. It's just something I found curious after looking back through my collections and wondered if anyone else found it interesting/had had any thoughts.