Yeah the new Summoner is a damn awesome framework actually, it's just annoying they didn't do anything with it since implementing it. We don't need more major summons, we need sets of 3 minor summons being added, one each expansion, and pull them randomly with minor differences that are consistent between each set so the gameplay is about adapting on-the-spot to whatever set you got.

Examples:

* The current set becomes the "mobility" set, the first one you get.
* One new one is all casted. No exceptions. No ways around it except that one Swiftcast. Ramuh/Shiva/Leviathan maybe. "Caster set". Highest possible damage.
* Dawntrail adds one which has too few casts, fast casts but 2.5s GCD so good but not perfect mobility. This is the "delay" set. What happens here is that these 3 minors are weak, but each of their casts gives you a stack of some modifier that applies to the next Ruin or Tri-Disaster you cast, and one is removed for each Ruin/Tri used. Hence having "too few charges", you need time to cast Ruin in the second half of this set. This is a bit of a gamble set, damage/utility is high in the second half, but very low in the first half, depending on what the fight is like at the time this is either good or bad.
* Next expansion could add a "utility set", PBAoE heals, group runspeed buff, stuns, etc. This one could even disable in raids to not clog up the invocation queue.