Personally I think having a Wyvern following me around would be annoying and just get in the way like in XI. Also if LNC/DRG was given a wyvern. The stats of the LNC/DRG would have to be lowered to balance the fact we would have a pet helping us.

Instead of having a full time pet. I would like to see maybe an ability where it would summon a wyvern to do a breath attack then simply fly away again. That way we don't have scaled down stats and don't suffer from an annoying wyvern flying around us.