I agree with you about keeping Jackson. He is strong and smart enough to step in for Isaiah if needed. Plus, with the way the second string has been playing he might prove useful sometime in the future. Hopefully, Marcus' return will mitigate their recent woes.
At first I was upset Danny signed him despite his poor SL play. However, he showed he belonged with his preseason performances. My guess he'll get a chance to play if someone gets hurt.