Should Summoner...

[Saggo]

You just didn't like what was said.

I didn't, but neither did I see fit to attack your credibility.

All the summons except 2 were simply and firmly not optimized for use at that point in the game.

Choosing the avatar was always more than just numbers. The right tool for the job was literally the avatar with the right tools and several of them put up useful numbers while doing things that neither Garuda and Shiva could. Ramuh in particular had ever the ever useful stun and comparable damage in Chaotic Strike, for just one example. Numbers don't lie, obviously, but if that's your only criteria then other avatars were being underutilized.

It could easily provide a source of inspiration for summoner mechanics, but they cast aside the lessons there for the relatively homogenized approach of arcanist here.