I think Wenceel is only average bench depth for an outfielder. Great bench depth would be, he has a really good stick if bad defense, which would make him a decent fourth outfielder option if you have a strikeout artist and/or a RHH-heavy batting order in a game. He would also make a decent fifth outfielder if he had a ****ty stick but a great glove, where most of his reps are as a late-inning defensive replacement, pinch runner, or garbage-time pinch hitter.
Wenceel, as currently constructed, is neither of these. He is a meh hitter who, in the field, has the range of a 24-year-old rookie but also a noodle for an arm, which makes him an iffy choice for right field. He would actually be better-suited to left field, since our left field is pretty expansive, but left is already spoken for.
But, in the end, I don't think Wenceel has a place on any team that has present playoff aspirations. I think his future is either second-division backup outfielder, or starter for either a last-place team or a team hobbled by injuries.