If Onwenu is at RT instead of guard they still have three really good linemen and only need to fill two spots. The “problem” doesn’t change much.
I feel better about interior linemen like Mafi and Jake entering year two than I do about rookies Wallace, Henry or Robinson contributing. A player in year two should be stronger and more experienced than the year prior. Anderson can play either tackle spot or guard if he’s healthy, assuming he is provides ultimate flexibility.
Like I said, they should be able to cobble together a line, they can also outbid other teams after cutdown day for good vets who get let go for cap reasons. Having the most cap space now and being third in the waiver wire line is a positive.