pawsplay
Hero
What about penalties to Dexterity and/or Intelligence?
They're not supposed to be dumb or clumsy. That's such a stereotype. They're supposed to be overwhelmingly strong, but not invincible in melee. They're capable, if somewhat luddite, craftsmen, so an Int penalty is out.
I don't like the Large size kicking in late, because it means a small subset of the population is vastly more powerful in melee and can carry twice as much.
What if I started them dirt poor? That would seem to cancel out some of their advantages as 1st level tanks. Maybe 2d4x10 gp, regardless of class, like Druids. Since their armor costs double, that should put them on more even ground.
As Druids, one of their better abilities, wildshape, is less a boon to them than other characters, since they already have good physical stats. As Rogues, their size works against them. They would be terrible Bards or Sorcerers because of their Cha penalty. They have a slight advantage as Wizards. Mainly, I am concerned about them being super-tanks. They should be the best choice for a certain kind of warrior, but they shouldn't be the only one.
At higher levels, lightning bolts, rapid archery, and Mobility should take care of reach, I'm thinking.
Perhaps they could also be automatically illiterate, like Barbarians.