Certainly Ryder does not *feel* heroic. Even when I watch this awful advertisement on TV / in cinema, I really believe that Scott looks out of place in comparison to rest of the Team (I mean: he looks like a *nice* and *innocent* guy). When I am thinking about it, it is similar with Sara - she just seems to be a *nice* gal, which is hardly "heroic". I do not find it to be an issue - I am OK with Ryder being "nice", though I would still prefer to be more clear in terms of what Ryder is *about*. There is no clear agenda, no perceivable drive for Ryder to act, no direction Ryder wishes to *choose* - he or she reacts, and while it is understandable taking circumstances into account, it feels lacking. Shepard in comparison, while often misguided or in need to adopt, was much more consistent and felt much more "in control".
And once again - it does not *bother* me that Ryder is not in control. It just feels out of place for a game in Mass Effect franchise, and probably it messes with what I believe was advertised as game's premise.
As far as in-game "trust" in Ryder is concerned, I am OK with it. Scott/Sara succeeds in some significant tasks almost as soon as the game starts, so it makes sense to perceive him or her as viable. Plus he/she bears the title of Pathfinder - which is significant on its own. If anything, I would expect more people to provide comments like "Oh really, this cutee is a Pathfinder?" or "Aren't You a bit short for a Pathfinder?" ;-D