Where in the rules does it say that if a game ability does not specify los, then it dosen't? I could not find that.
Also, the rules do seem to imply that the players need to determine the order of play before starting to take their actions.
Counting Spaces, top of page 13:
Some abilities require players to count the spaces from a figure to the target of the ability. When counting spaces for attacks and abilities, players ignore any non-obstacle terrain in those spaces (see “Terrain” on page 18). The player just needs to verify that his target is in range for the ability to reach the target. If an ability affects figures within a specified number of spaces, line of sight is not needed unless specifically noted. However, when counting spaces for an ability, players cannot count spaces through a door because the spaces are not considered adjacent."
Now, I realize, having read this again, that it's talking about "abilities," and not specficially the actions available from Class Cards.
I also realize that it is speaking of when "an ability affects figures," but I don't see why a search token would be substantially different.
I understand the phrase "If an ability affects figures within a specified number of spaces, line of sight is not needed unless specifically noted," to be generic enough to apply to other actions and targets as well.
I have read that there are players who think the rules imply that the decision on turn order must be decided before the first hero activates, but I just don't see that. I imagine they're referencing the phrase:
"Each round, the hero players decide as a group the order in which they wish to act. This order may be different each round."
This phrasing might be considered to imply that this decision is made a the beginning of each round, but nowhere is this explicitly stated.
For a differing point of view, I point to the following from the Hero Turn Summary:
"After the player flips his Activation card, another hero begins his turn."
I note another hero. Not the next hero, which might be the language I would expect in the case of a pre-determined list. From this, I infer that there is no hero yet defined as next.
I recognize that this issue may require clarification from FFG.