|doc the grey|
In PFS they are not the best because of the natural instability of tables. One week you can have a full table of people who you built these feats with, the next everyone's sick and you're screwed.
In general what usually does it is kind of two fold. The first being that a lot of the teamwork feats are either not that good or stuff you can already do some other way with better feats (saving shield is usually way better than shield wall for instance since it does the same thing without having to worry about whether the other guy has a shield).
The second big issue is that a lot of the classes that help you get over this hump like a Cavalier have weird nerfs that hamstring them from really letting them shine. Like with the cavalier it's almost nonsensical that I get tactician but can only share the teamwork feats I get from tactician until level 17! Which makes investing in more to really get a lot of use out of tactician as the game grows kind of moot.
The final big thing is I feel they miss a key niche they could have which is giving non caster characters more ways to offer support to their buddies.
All that being said I've always loved the idea and with a few fixes I've found them to really shine in my home games.
For example I remove the other people need the feat requirement for a lot of them and allow the person to share the buff so long as the other requirements are met but does not benefit themselves unless the other guy has it.
For example if I have shield wall and am in formation with my party who have shields but not the feat I grant the buff to all of them. Or with precise strike my guy gives the buff to my ally in flanking but doesn't get it unless they also have the feat. Turns you into a hell of a team buffer.