Great feedback guys, thanks so much.
As an answer to everyone, these are just "sample" builds, to give a basic idea of the concept and implementation of 616, as well as the different approaches available to engineers based on individual playstyle. The engineer is, without doubt, the most versatile class in the game(imo), and I feel these builds reflect that as they all have different set-ups and slightly different playstyles. Look for links in my upcoming update to other 616 builds around the forums(or just look for yourself!) I am very passionate about this class and love hearing from all the other engineers out there.