+5 untyped init bonus? +5 hp per surge? +5 to perception?
The tribal feats create some serious power escalation. I hate power escalation, as it robs my characters of life.
Side rant: [If my PC has balanced level of efficiency, the DM needs to throw balanced encounters at me to challenge me. If my PC is more efficient than balanced, the DM has to throw harder stuff at me to challenge me. As the harder stuff is higher level, I'll gain more experience per combat. This will result in my character advancing through levels faster than for a balanced character. As a result, I get to play th character for less time at every power level, and the character retires earlier. That sucks.]
I'd have worked them a bit differently:
Tribe of the Swift Jaguar
Benefit: Once per day, before rolling initiative, you may choose to either use the initiative bonus of an ally within 5 squares that also has this feat, or you gain a +2 (untyped) bonus to initiative for that combat.
Tribe of the Enduring Mountain
Benefit: Once per day you may either use the healing surge amount of an ally within 5 squares that also has this feat when using a healing surge for healing, or you can can gain the benefit of a healing surge without expending one as a standard action.
Basically: You can gain a small benefit, or share in the expertise of an ally.