Ah. Good idea to do it here.
Is this the adventure Flamestrike came up with to demonstrate the utility difference between the Wizard and Fighter base classes in general play?
Yeah. In the context of a standard adventuring day (6 or so combat encounters, 2 or so short rests, a mix of social and exploration, roughly cleaving to the AD XP charts in the DMG).
We've had two encounters so far; one entirely social (get info, try and convince the church for extra help) and one combat (that didn't need to be; a DC 15 intimidate check would have worked, but we took the nuclear option instead

)
Notably the Fighter could have easily hit many of the skill checks required so far, as could the Bard (we haven't statted him up, but he's a Valor bard mostly) and likely also the Rouge, seeing as they're mostly so far Persuasion, Intimidate, Insight (the Cleric is good here as well), Investigation, History and Arcana (where the Wizard has done well).
Magic hasnt done a whole lot yet.
Augury was gave some indication the bridge was out, and the
Familiar has done some scouting (that the Scout Rouge could have done a lot better).
Water breathing might come in handy now they have this river to cross though!