Honestly, the "Trance" system is more evocative of the actual "Summoner" job in Classic Final Fantasy than the Egis are. I mean, until FFX and FFXI, Summoners simply called upon beings to do one specific attack. Summons didn't stick around on the battlefield and fight with the party - they were called, their power was used, and they left. However, in an MMO setting it'd be too clunky or flashy to have an entire giant primal just SHOW UP to do one attack. In XI they had Avatars but XI wasn't terribly optimized as an MMO and its combat was much slower and menu based.

XIV's pet system seemed to be the devs listening to the playerbase about having a pet job (SMN/SCH) and while its worked well for Scholar, Summoner has just had people bitching about it endlessly because it isn't what they want. The Egis are too small, they're not detailed enough, there aren't enough of them. The OP totally missed what Yoshida was saying in the interview - the constant demands and complaints about Summoner can make the Dev Team feel like it was just a waste of time to even put the job in the game to begin with because no one is ever satisfied with what they do with the job. They try to make it pet based, people bitch. They try to move away from it being pet based into a more traditional "Summoner" role, and people bitch they aren't getting enough pets.

You don't get to have Summoner both ways. Its either a hardcore pet-based job that remains a pet-based job and any plans for "Avatars" or full sized Primals goes away (because rendering them would be a damn visual nightmare for anyone with lower end specs), or it becomes a more classic FF-style version of the Summoner, and the pets get pretty much relegated to turrets that deal extra damage to boost the Summoner's output.

I honestly prefer the Trance system and hope they expand on it with other Primals in the future. Using Deathflare is really cool looking, and its incredibly powerful. Using Teraflare as an LB3 is awesome. I feel like a Summoner when I do those things. Yeah, the Egis are neat, but I'd rather the Summoner end up with more powerful main abilities and flashy animations than just an ever expanding array of pets that become harder and harder to balance around.