Paizo needs to throw the current PF2 system in the garbage. They need to understand that Paizo will only remain relevant if they stay in D&D's orbit, and stop dreaming.
An independent Pathfinder will never be nearly as large.
Then they should hire a new set of designers that create a Pathfinder version of 5th Edition that keeps the DM-side simplicity, while beefing up options and build complexity of player characters and high-level monsters.
Our experience with the playtest was also very negative, primarily for this reason. They assigned us to do a "stress test" instead of having fun with it. All the encounters of "see how many mindless fights you can endure in a row without healing" type of playtests should have been handled internally.
The Doomsday Dawn playtest came across as lazy and rushed. It was a bad promotion for PF2, and it certainly didn't win any fans in my region.
In the face of a popular and good enough version of D&D there isn’t anything Paizo could do. At least I don’t think anything listed so far as options has a real chance. But then maybe their goalposts are not where a lot of folks goalposts seem to be. IF they want to create a game they can be proud of and satisfy enough of a Pathfinder brand fan base, maybe that’s enough for them?
If so then I’m shure it’ll be a success.
This I don't see PF being number 1 anymore. Peak Pathfinder was only about 20% of 5E they can probably do alright on a lower figure. Even half of peak Pathfinder would be around 10 times the size of an OSR publisher. If they keep what they have and appeal to 5% or 10% of the 5E players to buy in they would be fine.
Personally I'll need a preview or something like the 5E basic rules to buy in.

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.