Barley,
In regards to the sweetness, it's all good, we all have different tastes and detect things differently than one another. I have been almost exclusively smoking Virginia's since January and have really ran the gamut of flakes. Capstan Blue is a full flavored, sweeter, and less grassy tasting flake compared to many of existing VA flakes out there.
I smoked mine right out of the tin, and have had no problems on the charring light, or on the regular light. Sam Gawith is way different. I can't do either right out of the tin, same with Esoterica blends.
Have you tried cube cutting the flake? This is also a great way to get a nice even and dry burn all the way through.