True, this is also part of a thread in the CC forums but Devs don’t interact or response at this: * Please Reconsider Group Loot Only in Vault
I think Devs just avoid this issue because LFR will be available in next expansions via a NPC and they don’t care about players that want to collect a transmog now. Devs should fix this kind of things now by implementing new ways to earn those sets, maybe a currency from LFR that you can use to buy a cosmetic version of the set.