I remember the Summoner in PF1. I remember getting Haste way too early and the other problems they could cause. I remember synthesist summoners having twice as many hit points as anyone else on top of fast healing and impressive damage output. I remember how crazy they were.
The new version of the Summoner isn’t as crazy as it was in PF1, but it’s still very cool. You get to live your dream of summoning a monster that fits nearly whatever you can imagine, building your own best friend from the ground up to work alongside you against whatever dangers the world has to offer.