This thread has been very interesting to read. My group has only made it to NC once out of three games played with the expansion because the cylons dominate so badly. The one time humans did make it to NC, the last morale was lost on the second players turn. However, we were playing with the rule that humans had to be able to fulfill all requirements of "choice" cards. Not doing that will help. We weren't even aware of the cylon admiral issue. That would have been an unpleasant surprise discovery... 
In addition, it appeared to me that NC seemed to be easy for the humans overall. Is it the general opinion that the last battle after Galactica returns is very easy?
I like the idea of a skill challenge to jump the fleet but I am always loathe to add house rules? Is there any indication of any of the designer's thoughts on this problem?
Is it better to use the sleeper agent instead of the sympathizer? Due to the additional infiltration rules, we have just continued to use the sympathizer(as explained below).
One last thing, no one in my group has played with the cylon leaders. (Most are new to gaming and avoid anything that looks too complpicated) Are they worth playing? Thanks.