I mean I don't know if that's really accurate, this new XIV summoner fits in perfectly with how FF summoners have been. Let's look at two of FF's most iconic Summoners (if not THE most iconic ones) Yuna and Rydia. Yuna is a primarily summoner/healer who brings out a big ass summon who does some big power attacks then leaves if it is defeated. The summons are very similar to demi's in that way, the only difference being the summoner takes the place of the party. Rydia on the other hand just calls on a summon, it comes in, does a super move and leaves. This is very simmilar to the new summon gems.
The problem with this thought is... They have tried that. Literally for 8 years through at least 4 different reworks they have tried to figure out the pet AI and put it into a playable state that players have liked. And they have failed at each attempt. No matter what the devs tried, the players haven't really gravitated to a pet system that did what they wanted and expected of it. At a certain point if you cant fix a problem despite giving it your best effort, removing the problem entirely so you can focus on something new is a valid way of handling it.Hell, it makes it much simpler to develop without the AI, but the AI is what makes it unique.. wish they could have just improved it.. instead of removing it altogether. ...