Why would you do this? Well, why would you do anything? Games, like life, are an inherently stupid activity where you can do whatever you want.
The following are quick fixes that don't require too much work. I certainly haven't playtested them.
design PCs as NPCs
In-depth character build options, while arguably the main draw of this kind of game, make characters dying kind of a pain in the ass. So use the rules for generating NPCs of a given level for PCs. I recommend randomly rolling on a background table of your choice (make one for your setting, or use the careers from Finders Keepers) to determine what tasks you're high/moderate/low; feel free to roll also for race and class.
Just so you can enjoy the character build minigame at least a little bit, give yourself a heritage feat, a archetype dedication feat if you're level 2+, and a class feat of your highest level.
(Alternatively: get two archetypes at random, or one at random and the next on purpose. For each, get all its feats, plus an ancestry and its heritage feat. You're average at everything unless noted otherwise.)
Since these include the benefits of permanent magic items, GMs should only hand out consumables and Weird Shit as far as magic items go.
reaction rolls
- 2-3: Hostile
- 4-5: Unfriendly
- 6-8: Indifferent
- 9-10: Friendly
- 11-12: Helpful
morale
Each round of a fight, if the PCs are winning, monsters (who aren't immune to the Frightened condition) roll Will vs. 10 + party level. The DC of this increases by 5 for each level of Frightened the monster possesses, so don't hesitate to spend an action Demoralizing the enemy!
xp for gold
Use chart 10-10 on p. 511.