Some of them hate it. I'd argue that's because they've gotten used to casters from the 3e period on being overtuned, but they'll of course disagree.
On the other hand, I'm playing with three people who played a fair bit of PF1e, and at least two of the still play casters fairly often, so I again have to assume its not a complete dealbreaker for such folks.
(As it goes, I'm not intrinsically hostile to casters, but as my statement above indicates, I think 3e and PF1e casters were overtuned (and probably ones in 5e too but I'm going by word-of-mouth there) so if that translates into "anti-caster bias" so be it).