To start off with I love the core book, it has some issues but it's pretty close to the perfect system for me. I loved power option choices, as well as multiple paths I can lead a character down. So I was extremely excited when I realized how quick we were getting new content.
I ordered LOWG from Amazon (Had had to wait longer then I expected...) and when I finally got the book and cracked it open to the Archetypes I was... severely underwhelmed. Some were pretty good, like Red Mantis Assassin, and the Rune-scarred. However many of the feat choices are situational at best, or don't feel like they live up to the fantasy of the Archetype. Even more some require harsh requirements to even join them, preventing a lot of cool builds with out deep investments feat wise. The Hell Knight Armiger doesn't even feel like it's complete, one feat gives you resistance based on your Reckoning but that knowledge isn't even in the book. I chalked it up to being kinda rushed to be released with the Core book.
Once more I waited and today finally got to see the LOCG! Very quickly it became abundantly clear that not all feats and heritages are created equal. A level 9 Goblin feat lets you spit fire for a whopping 1D6, and you have to be on fire to do this, yet a level 9 human feat lets you take a Multi-class dedication feat. A elf heritage gives you a multi-class dedicate at level 1, but my monkey goblin gets a bonus to climbing and a situational climbing feat... what would be cool is if that tail could hold a item, so I didn't have to draw it. The Hobgoblin heritages feel like a joke for the most part and don't come close to the power or flexibility of the human or elven feats.
Now there are good parts to the book. I feel the Lizardfolk, and Leshys are well done. The Knights of Last Wall as a whole have a bunch of really cool feats that allow them to shoot sun beams, use shields two handed, and cone attack with their weapon! Then you get to the Hell Knights are it gets extremely boring. Most of the Order abilities are very uninspiring and honestly not worth picking over your class feats. Order of the Chain could have had ghost rider style flame chains, the Order of the Pyre could have been able to combust their foes, Order of the Nail could have had some crazy Iron Maiden like ability! They don't.
Pathfinder 2E has a chance to reinvent it's self and be better then every before. I saw that when I bought the Core book and every book since. I hope the Dev's take bold chances and give us crazy fun abilities, like the Sun Blade.
That's my 2 cents.