But Eagles coaches have deflected criticism, saying mistakes elsewhere have made the line appear worse than it is.
Tangible help may also be on the way with the returns of Todd Herremans, Nick Cole, and, most likely, Jamaal Jackson, plus the trade for guard Reggie Wells. Still, Herremans, Jackson, and Cole are all coming off injuries and arrive with, yes, questions of their own.
The ultimate answers, to be delivered over the next 17 weeks, will be crucial to the Eagles' season.
All of the eye-popping talent on the young offense can be neutralized, or at the very least diminished, if the front line can't give quarterback Kevin Kolb time to get the ball to DeSean Jackson, Jeremy Maclin, Brent Celek, and others.
"It always starts - run and pass, and how good you can become offensively - right there with the offensive line," said offensive coordinator Marty Mornhinweg.
The signs have been worrisome. The Eagles' aggressive defense got the better of most training-camp battles. The Bengals pushed the line around in the preseason, and then the Chiefs, one of the NFL's worst defenses in 2009, battered Kolb with blitzes.
Talk to the Eagles coaches and their offensive linemen, and they say the team just needs to work on technique and focus.
"Really, if we're healthy, I think they have an opportunity here to be one of the very best offensive lines in this league," Mornhinweg said.
Health has been the source of one of the most significant concerns facing the line.
The top-choice line - Jackson at center, Winston Justice and Jason Peters at tackles, Herremans at left guard and now Cole on the right side - has not played a game together since December. Jackson, Cole, and Herremans logged little practice time in training camp and Wells is entirely new to the team.