Always acting in surprise rounds (unless deafened, a rare condition) means they basically never get ambushed. Elfsight gives them the only sniper scope in the game - being able to see a mile is also handy if you're out of doors. +4 Wis is HUGELY burly as far as attribute bonuses go - consider that a human has NO option for a +4 bonus in any Talent. The half healing would be crippling in D&D - but fortunately this isn't D&D, and you can heal pretty dang quickly without magic (note natural healing is not "an effect").
Never getting ambushed is nice. But it only comes up in a very specific situation (being ambushed). And after the surprise round, the advantage does nothing. Meanwhile, compare this to natural DR or Breathing Flame... not really that exciting.
The sniper aspect is cool, but only if you play a lot out doors. A lot of fantasy gaming takes place in doors or in urban environs, so that is pretty limited.
The attribute bonus... standard humans in all 3.X iterations suffered from not being able to match non-humans in a specific attribute, whether that was because they never had a modifier or the non-human had a higher (or more) modifier. That seems to me to a be a wash with human's versatility and their lack of an attribute penalty (especially Con).
Granted, I don't know all the uses for Wis in FC... does it effect spells like in D&D?
For myself i'm not really pleased with things like iconic classes because it seems limiting to the designer's view of a race rather than being able to fit my worldview.
There's a species feat for that. Alternatively, you can swap classes to fit your campaign.
Which brings up another point... the 'iconic' drawback is /only/ a drawback for people who want to play outside of the proscribed limits of the implied setting of FC. If they are fine playing those classes and backgrounds, they aren't penalized.
So, as a Drawback, its not really universal or consistent (like 1/2 Healing is). That being the case, I don't understand how it is a balance at all. To paraphrase many point based games, "A Drawback that isn't a Drawback isn't worth points." In this case, playing the iconic means you get your 'power' for free. And if your powers are free sometimes, then why aren't they free all of the times?
Why not simply make humans more powerful?
Because that would blow the doors off compatibility with our other games? Humans are powerful through flexibility.
I'd not imagine much cross pollination between FC and Spycraft, but I'm not really aware of other lines you have planned.
Wouldn't the flexibility (the choice of Talents) that allow Human PCs custom optimize their class/combo be their 'power' which the other races by virtue lack?