I honestly don't think it would be game breaking for the reasons I've already mentioned. At the end of the day though it's the dev's choice and who knows maybe summoners will get some sort of ability on a long cool down that buffs up the Egi and makes them larger for a bit similar to Beastial Wrath from wow OR maybe something similar to Astral Flow from FFXI but they take on the full primal form to unleash their ability.
