Hey Dale, First let me say your thoughts about lighting are very advanced. However it's not practical for the average lamp-worker. Keep in mind that most of the people here do not have lights powerful enough to pull it off. Or a camera stand sturdy enough to work with the long exposure it would require.
As Far as reflections go, what's to stop the it. Glass reflects every thing. No matter how you light glass the lighting source will show in the glass. So what we're really talking about is a trade off.
The idea your putting forth is indeed valid, and a key stone in the photographer's arsenal. Bounce lighting! But without a key ( main light ) light contrast is lost. Colors are lost and motion is lost.
My problem with light tents are they are too soft. They reflect over the entire surface of the bead creating a film of sorts that blocks contrast. Also its unnatural. Our minds expect to see a high light. So a high light is not a bad thing. The trick is to understand that and to use it as a design element. In the words of Blue Oyster Cult " don't fear the Reaper". Meaning its not always the best course to try to improve on nature.
Take a look at this photo. Are the strong high lights a blessing or a curse?
Just a thought
Scott