About the bonus skills: I don't see the issue with the Archaeologist not having a bonus careers skill in the combat category, it's not like archaeologists receive combat training is it? And there is no forcing the archaeologist to spend his well rounded on a combat skill - you can still train and make use of combat skills without having it as a career skill. Sure it will cost you more, but would combat skills really be the main focus of an archaeologist character? I think not, I mean it can be obviously, that's why the well rounded talent is there, but if a players wants to be combat oriented, I'd pick a different specialisation, like Big Game Hunter or some other career even. I see no reason an archaeologist should have any combat bonus skills, their work is sort of different, isn't it?
About the talent: Given the vagueness in some talent descriptions (and open-ended conventions of this game) I'd say there is a good basis for an interpretation that this talent suggest cooperative story telling, it's a fundamental principle of the game really (it's in the dice mechanic even) and this talent should obviously allow you to do more than a normal knowledge check. In that sense it becomes, to me, a natural interpretation of the talent that it puts more responsibility, and power, in the hands of the player.
It's 25xp and once per session, that means it should have more potential than a normal knowledge check (or a "re-roll" option if you failed some other knowledge check).
Sure cooperative story telling is something the group agrees on and no a talent isn't necessarily needed - as I alluded to above this game is based on the assumption of a social contract wherein all the participants have agreed to create and cooperate on creating fun and exciting stories, facilitated and guided by a GM. In the case of this talent it gives more power to the player, it gives incentive to the player act and it also creates incentive for the GM to make room for it, more so than normal and it allows players to take on a more active role, and they can make it happen at their own volition and not just at the mercy of the GM or destiny point, or extreme dice results.
