Very true! A had the same impression and was amazed when I heard the isolated tracks...If you listen to his isolated tracks you'll be amazed at how they sound. Thin and middy. But in the context of the mix, HUGE.
Double tracking, sustain, a spike in the EQ and digging into the strings helps. I doubt that you'd create a patch that sounds like what's in the mix. That as a stand alone patch is not very impressive. But, never give up.