Couldn't have said it better!IMO molasses is a pretty big sugar chain for the microbes to break down, there is actaully alot of residule left in the soil that the microbes cant digest, if you guys really enjoy using molasses it should be used in a compost tea where it is more easily broken down, and used over a long period of time in the tea to feed the microbes.
using a sucrose and glucose are more easily broken down by the microbes and ready to be used by the plant, dextrose is too big for the microbes to digest in a small amount of time.
ive switched from using molasses, everyone in my area thinks its the way to go, i personally hate it, i think it coats the roots and soil in a thick black tar, it makes the soil smell. i think if you spend some time researching you can find something much better and soluble than molasses
check out nectar for the gods sweetner, its a great start for organic sweetners thats already broken down and ready for the plant to uptake it