SMN just need more abilites that interact with the pet. I think DoTs+pet work well because FFXIV is way more fast paced then FFXI so the summoner himself needs to be able to do something other then just issuing some orders to the pet.
I agree that egis should have the size they have on the job trial quests, I'm not sure why they aren't like that.

What SMNs really need is a revamp on pet skills though. Ifrit is still somwhat useless and Contagion needs to become a SMN skill or otherwise Levi and Ramuh-egi will also have no chance to stay competitive.