I don't know...part of me thinks that Webb dying would just be wrong for the plotlines. He's such a good character to bring back now and again. But I concede that the way it ended looked like Gunny might not get him to medical help in time. But then you never know what kind of scriptwork will happen to have some medical personnel magically appear to patch him up enough to keep him alive.
Although, if next season is the season to bring Harm and Mac together, then the next season might be the last anyway, so why keep Webb around for it?
Can we just skip over summer to September?
Harm working for the CIA...I don't know...maybe a few episodes...I still think the Admiral will take him back, although probably will make him pay bigtime for it.