To be fair, you can't miss seeing Wyll, at least; you more or less have to approach the grove, and he makes a big entrance. It's pretty unusual for him to die there - I've played that goblin attack many, many times now, and only had him die once, when I was actively trying to get everyone killed. A scene where he calls out to you in some fashion and invites you to follow up with him wouldn't be a bad thing though.... or causing him to grab you into a cut-scene the first time you walk by the training tiefling kids at any point.
By contrast, it's very easy to miss Gale, since the stretch of road he appears on is entirely non-essential, and I've seen other players just never walk down that particular path, because they naturally see both ends of it, by other means and so never see a need to walk that particular way.
People who don't walk down every possible path are heathens and don't deserve to have nice things.
