Elemental Tempest is broken unplayable as printed, and Spellscarred Savant has extraordinarily crappy powers almost to the point where it, too, is broken. Whirlwind Genasi is interesting, but also unclear as printed (Tumbling Gale has no range).
That leaves lots of crap. War Wizard of Cormyr is crap, Sword Coast Corsair is decent at best, Steelsky Liberator is decent against big things (especially dragons) but crap against most stuff, Spellguard Wizard is barely mediocre, Silverstar is crap, Heartwarder is crap, Evermeet Warlock is barely decent, Drow Wanderers can always find something better to do, and Doomguides can't decide whether they want to be crappy leaders or crappy defenders.
Simbarch of Aglarond is only really good against Elites and Solos and sub-par against anything else, Purple Dragon Knight has some neat tricks but isn't that hot, same goes for Morninglord. Impilturian Demonslayer is good against demons, but not so hot otherwise, Eartheart Defender is a decent PP.
The one good PP that I haven't talked about is Ghost of Eventide. That one is cool. That said, we're still talking about 2 PPs that are either broken or have broken features, 10 crap PPs, 5 mediocre PPs, and then the stuff they had to do to make good.
As for crappy PPs in the PHB, I wouldn't call any of them outright crappy by the same standards as the ones here, they're all at least on the same level as the "decent" PPs in this book. There are, however, some with broken mechanics.