JetBlue only added it to increase mint utilization on Saturdays. I'm not sure why AS is so eager for what seems to be a tiny market. It's probably not a big loss for B6 if they give it up at some point and try a different Saturday only mint market.
Although longer term, it does beg the correct of where JetBlue can actually add out of LAX. They don't seem to have the resources to build up LAX operation