The Suns 4 is extremely extremely good, but this isn't a Warriors with KD scenario at all where it was basically 100% guaranteed they'd win the title if they all stayed healthy. There's a lot of injury concern they have to fade, they have to get Ayton back to his 2020 playoff levels, they have to field somewhat of a roster and depth chart.
Obviously need to see the rest of the off-season, but I do think they'll be comfortably like a top 3ish team to start the year. But certainly not an unbeatable juggernaut.
Also, I'm not sure why everyone is just pretending Chris Paul fell off for some reason? He was better than Beal last year and he's the engine that makes Ayton go when they want to. Hard to rely on 38 year old CP3 to keep it up for sure, but I think you could pretty easily make the case that this move probably makes them worse next season than if they just held CP3 one more year. After that? Sure, Beal gives you more value.