First off, what is the point of coming up with technical details and oGCD or GCD status, when that is SE's job to do. Just like the primals I listed, they were just ideas, nothing set in stone. Merely options to broaden what you could bring out as a summoner.
Second, the "old vs new" stuff. I get people were comfortable in their non-Summoner job where all they did was manage DoTs and Ruin and never actually summoned anything. Beyond alternating between your Garuda pet for Trash and Ifrit pet for Bosses. Which stood around and did their own thing until you could actively command them to do an attack.
I much prefer it now. I can summon an Egi, which I hate, or Carbuncle, which are honestly kind of childish. Or at least at 90 I can actually summon a Primal that looks decent and interesting.
Third, the whole "Gemshine" bad thing, is honestly getting to be a joke. And people don't even realize how big a joke it is.
Old Summoner: Egi Assault, Egi Assault II, Enkindle.
Using Ifrit as an example:
Egi Assault -> Crimson Cyclone
Egi Assault II -> Flaming Crush
Enkindle -> Inferno
New Summoner: Gemshine, Precious Brilliance, Summon, Astral Flow
Again, with Ifrit:
Gemshine / Precious Brilliance -> a fire aoe attack (the new Ruin)
Summon -> Inferno
Astral Flow -> Crimson Cyclone (And Crimson Strike may as well be Flaming Crush)
So, how exactly is "Gemshine" so bad now? I'd like to hear an explanation for this, instead of the constant lament that the Ruin is gone.
So, Ruin becomes Gemshine and Brilliance. Exact same spam, but with different animations based on element.
And Enkindle is merged with Summon, so you use it nearly as often as before. Nothing was lost there.
And lastly, Egi Assault II is renamed Astral Flow. Which we did lose the Egi Assault attacks, I'll grant that, but that's not even a big deal.
All SMN really lost was the DoTs, that never fit SMN to begin with.