I'm playing a summoner. Given than 5e doesn't have a pure summoner/pet class, and that's kind of "my thing" I had to give it a shot. It's wacky as hell to run keeping track of all the actions and 1->2, 2+1 etc. trades, but I'm finally getting the hang of it. Hard not to get sucked into analysis paralysis land sometimes.
I uh...also took the Beastmaster free archetype so I have 2 pets at all times, not counting potential summoning spells. I haven't sat down and did the math to see if that would even be doable with the action economy...:)
Edit: We are playing in foundry. I honestly don't know if you could pay me to play PF2E on paper. OK, that's a lie, you could absolutely pay me, but I don't know if I'd do it for free!
I also enjoyed it far less than I wanted to. Re: Your 2nd point : I find this really funny as I just started a sorc the other day and one my first reactions was how terrible the spell animations look for a modern game. I've been tempted to re-install Diablo 3 just to compare them, as I remember them being much better.
I finished the campaign as a Druid and am now tinkering with the other classes, so nowhere near endgame, all my feedback is just from the above.
FWIW, I'm enjoying playing my sorc more than the druid, but we'll see. By the last 2 acts, I could close my eyes and hold two buttons and kill any of the bosses (except the last boss where you have move 3-4 times).