I find myself referencing Power's response frequently when Pathfinder comes up over on my Neverwinter side of things. It's an excellent shorthand as to why Pathfinder had some real drawbacks, and a very handy link. So thanks for that!
Indeed, Power’s post is a great summary of the biggest problems in PF. For me, it mostly just comes down to Feats and Prestige classes being far less interesting. The PF base classes and their archetypes are usually pretty neat by 3.5 standards, but it still ends up feeling like there are less total options and less stand out options for character creation, and that’s a shame.
Feats and PrCs are most of what makes 3.5 character creation so amazing, with spell selection trailing behind them. In PF there are hardly any that give you great new options or intense tradeoffs. Most are very even-handed, unexciting picks. Bonuses are limited, and even the better ones are auto-scaling. This dearth of good leaves me wanting to take flavor feats that let me do something cool instead. Only to find that there are hardly any good flavor feats either?? You have like, possessed hand, a few conduit feats, some bloodlines, and a scattered assortment of specialized feats which are mostly race-restricted. There is no feat like Words of Creation, or Dark Speech, or Mad Alchemist, or even Shock Trooper in Pathfinder, and it shows! Prestige Classes are also an afterthought most of the time, usually not worth losing levels in your main class. Building in this system, and then looking back at the huge library of modular content made for 3.5 with all kinds of amazing odds and ends, it makes one sad.
The Erratas however, are indeed the most heinous part. The one of greatest personal offense to me, was an obscure FAQ ruling that dishes out multiple nerfs to martial builds that are so extensive that they completely decouple the build motivations for natural attackers and certain weapon attackers from what they were in 3.5. The Size Scaling nerfs. They decided, years after the fact, that size bonuses and effective size bonuses do not stack in the way that they had in 3.5 and in PF until that point. Nor do they even use the same table that the old rules did (even though this contradicts many feats, abilities, and stat blocks that more explicitly lay out size increases to damage.)
Instead, they say, the size scaling table progresses in a weaker, more confusing way - AND that each character can only have a maximum of 1 “real” size increase and 1 “effective” size increase over its base size. That is two very significant nerfs to weak archetypes that didn’t need it, and it’s in contradiction to almost everything else, found on some arcane FAQ page. That is just ridiculous. Monks, say goodbye to your dreams of 6d6 punches. Niche specialized natural attackers, good luck getting your favorite ability to do any damage! You want to wield an oversized weapon for extra damage? Why would you ever want to do that?
The bottom line is, you CAN have a great time with either system, but PF1e is never going to be a true successor to 3.5e’s throne. Marrying the two together gives players more options, but it creates all kinds of difficulties due to the different balancing and design strategies employed over the game’s life cycles. Both games are finished now, and they will continue to sit uncomfortably near together in their inequality until one or the other or both fall out of use.