The summoner class has to become more pet oriented. At least thats what he is supposed to excel at. The scholar feels more like a pet class than the smn.
I also like the idea of unlocking the egis full potential after beating the hard version of the primals. This would be similiar to the way you obtained the primals in FFXI.

But overall the skillset has to change. The pet has to become the main dmg/support source instead of the summoner itself. I would like to see the smn having to summon the right pet for the right situation. In that regard FFXI did it right(not arguing the actualy usefulness of the skills but the idea that was tried in FFXI). For example you need support skills/heals you summon carbuncle. You need debuffs you summon Diabolos (not in the game just giving examples) etc.