Ace, Esera, Taggart, Moa, Kelly are a good lb group
Several of those guys should take a leap from last year. I am not too concerned about linebacker right now. Esera is fully practicing, so that is great news, he seems like he could be a beast and Kelly sounds like he could be the best of the group and a leader on D. If you were going to suffer attrition at a position, linebacker would be preferred over others.