I've heard these opinions echoed online recently, especially with the new girl added and this completely baffles me.
I see no reason to hate the combat changes in particular unless one was intentionally grinding a certain boss with a cheap mechanic that has been removed Royal. Guns were useless in vanilla because once you ran out of ammo that was it for the entire infiltration. Showtimes are neat mid-battle attacks that are rare so it's not like they're wasting your time so even if they did they're still really enjoyable to watch.
In regards to new SoL/Confidants, you get a whole new semester so it's easier to branch out your interactions with the other characters and with Morgana not forcing you to bed so much, interacting and developing your Confidants is even easier. As for the new girl, like I'm completely dumbfounded that people are having a problem with her. I keep seeing people saying she's forced and pushed on you. She's not even a party member until the new semester and you can decline all her interactions just like everyone else. The only forced interactions with her is the one where you start her social link and small little greetings at the start of your day just like everyone else.
She's nothing like Marie from Persona 4 who was actually forced. They steamrolled her into everything including the Velvet Room which was usually only for the MC.
one of my hardcore persona friends said that they ruined P5 with this
he hates the new girl that they added in particular, and the story changes that came with