Using Blocks in Quartus II

I've been using Quartus for 12 months coming from a loong firmware background ... I have used the Node+Bus+Symbol style from the beginning. After trying once then putting it off till now, I finally set out to figure out what the possible advantage of a conduit was :

I eagerly hoped a conduit was a circuit analog of a "C" struct in the way a bus is an analog of a "C" array - this would have been very useful, to be able to have named members bundled (and further sub-bundled) into an entity rather than bussing them up & down heirachies and explicitly converting to named nodes at the ends of the bus.

Alas... this doesn't seem to be the purpose of a conduit, not if I wish to retain the Node+Bus+Symbol layout style.