'Ace' pitchers getting blown up all over the place this year.
There's a lot of unknowns on the team. Most of the young guys that they'll be playing this year, and there'll be a lot, are fairly highly regarded prospects. What makes them a bad team? Mostly inexperience. The guys they need to carry their offence really are Suarez, Votto and Bruce while there will be others that chip in and have performed well at different points, or at different levels.
The real question mark is surrounding the pitching staff and bullpen. The bullpen is probably the scariest part of the team, but the rotation with some combination of Bailey, Raisel, Disco, Finnegan, Lamb, Simon, and probably Stephenson and eventually Reed has a lot to offer.
But I guess it depends on semantics again. Do you mean a young player playing well is overperforming just because people expect the team to be bad? Anyway, even if the young guys don't step up there's still a pretty decent floor for the team IMO, but there's also a pretty decent upside if they do.