Went to SERE about a month ago. I think SERE is great for the average young sailor who has never spent a night in the field or felt threatened by violence, but I don't think that it should be a huge priority for Marine pilots. We've been through a lot of BS, starting in Quantico (or the boat school), up until now.
Was it miserable--yes. Did I learn anything--certainly. Should it be a requirement--ehh, probably not. Did I buy the t-shirt--sadly, yes.
I thought it was some of the best training I've had in the military. Some of the fieldcraft stuff was a little hokey, but most of the rest was really good training. I think it's of a completely different nature than the BS of Quantico.
I don't know if we should hold up the bus for everyone, but it does need to be a bigger priority. In my peer group of 8 or 10 guys at my first squadron, only 2 of us went. That's crap, especially when Navy pilots on certain platforms that have effectively 0% change of falling into enemy hands had 100% completion rates.