This is quite interesting stuff,I might try not using a glug to start with this year and build on that maybe try adding other attractors,and feed items as I go but only If feel I need to, I do agree you need to have faith in your bait and that must start from the bare boilie, this way as I tweak and change things I will learn more about what works and what doesn't,
Just out of interest if you guys were prebaiting would you always glug your prebait to replicate the bait you would use if fishing, or use the liquid as a boost for the times you are fishing to encourage them along quicker?