Perhaps and perhaps not.
Let us accept your belief (and my hope) that Onwenu will be playing RG, so that the interior will be just fine (starters and backups).
After all, the interior is only solid if Onwenu is at RG. Otherwise, we need one of the other OG's to step up.
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TACKLES
Anderson
Okorafor
Wallace
We need all THREE to be contrinutors. our OT rotation. Otherwise, we are counting on Onwenu, or on wanna-be's or never-will-be's.
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BOTTOM LINE
There are two situations where we will have a good OL.
1) Okorafor, Anderson and Wheatley are ALL ready to be part of the OT rotation.
2) Onwenu is playing RT with one of the backup OG's starting at RG: Leverett, Andrews, Robinson, or Mafi. This isn't a disaster.
Other situations are truly longshots, like counting on any of these to start or be one of the OT rotation: Jordan, Henry, or Wheatley or Lowe.