I don't think summoners need new egis at all. Maybe SE should have implemented the pet glamour system with Heavensward instead of "please look forward to it" but there was no reason to use Ramuh or shiva instead of garuda or ifrit.
Maybe you would have used them for the vanity, for their figure, but not for their abilities. But... Damn. You have the power to summon the power of bahamut. You will be able to akh morn!!! That's just... Amazing!!!!