On one hand, it's not blizzlike as vanilla was back in the day. On the other hand, blizzard later changed this the exact same way because premades were fucking cancer for anyone not in a premade. This has already been discussed to death on retail, and the consensus was that premades would get a 5 player cap (and addons that got around this were disabled). This is why rated battlegrounds were introduced, to get rid of premades in RANDOM battlegrounds.
I can see why elysium wants to make this change, and I can see why some players dont want it (not technically "blizzlike"). Both are solid arguments, no idea which side of the fence to be on.
helpful thread to read: https://us.battle.net/forums/en/wow/topic/7200052820?page=11#214