I thought what they were trying to get across is that 'love', or perhaps better 'humanity' is the secret ingredient in successful cylon reproduction. So in that sense, the resurrection technology probably is a hinderance. What I mean is that 6 and 8 are the least machine-like models, and they're the two that have achieved it. Love led to Hera, at least. Caprica 6 and Tigh is a little more complicated, but it's obvious that love was a part of it by the end, and that a question of that is what ended it.
I think that's part of the whole 'what is human? what is cylon?' question. The cylon civil war was essentially the machine cylons (cavil, doral and simon) attacking the human cylons (leoben, six and sharon). We learned two weeks ago about Cavil hating what he is, wanting to be more of a machine, and the whole series has shown six, sharon and even leoben (albeit in a twisted way) seeking 'love'.
It's pretty deep stuff if you stop to think about it.