Motivate Retribution is 2x the damage of the Commander's Energy Shield, and you were worried that Energy Shield was too strong, even though it's also typed damage and affected by DR. So based on that, Retribution needs a nerf.
Inspire Pain I would agree with the changes, although if you're really worried about damage, make it lock to non-lethal for the first level or two.
Motivate Endurance doesn't specify what the bonus to AC is. Assumption is aura bonus, but that's not called out anywhere. And I would honestly just ditch the temp hp mechanic and replace it with something less likely to cause mechanical quandaries, like healing. Also, the way its written is odd, because it means that someone fully healthy, except with only 4.5 hp a level (a wizard with crappy con, for ex), gets bonus THP above their natural maximum. Not sure if that's intentional.
You also might consider stealing the Crusader's Delay Damage pool mechanic instead of the THP one. Just suggestions, though.