What is the difference between your supercarriers and your dreads ?
If both were on the field at the same time, it would be like comparing a harbinger with a myrmidon. Both do the same, but use different weaponry.
However from another perspective, which is operational range, dreads become more flexible. You deploy "insurable" caps to make beacheads (once cynojammer is down) into enemy territory and then bring in the supercaps to provide fleet projection. Titans become the staging mobile base moving behind the front lines, but can also serve as reinforcement to the offensive or defensive fleet (that is if uber-ganglink bonuses are accounted) to hold position.
However my suggestion does not completely resolve one issue, proliferation of supercaps. Carriers logistics might become the weak link , and therefore other supercaps might be endangered if their tank-backbone is taken out, but you really don't put the supercaps at risk.
I've been trying to come up with some answer to that, and the only concept that spurs to my mind is "a parked supercap". In all intents it would be quite the juciy target for any confrontation, but it would require some sort of mechanism to lock the ship in a sort of POS array solely to
one character. And not have it "floating" inside a POS or "tied" to a char for the rest of its eve game life. If that would happen, then i bet we would see some more risky fleet maneuvers to target strategic goals inside enemy lines.