I have looked across the Tasman Sea and I am sure you are all aware of the availability of an "Uncapped Data Allowance - Managed Traffic Speed - Optimised for ADSL2+" internet plan. Also notable was in addition to this was a higher tiered plan option with a relatively large data allowance cap for "Home Businesses, Gamers and Heavy usage" who rely on an uncapped traffic speed.
Can something similar to this able to be offered?
State upfront that traffic is managed on the "uncapped data allowance" plan.
In the same instance, for those who need the speed, offer an unmanaged traffic plan with a very generous data allowance cap at a slightly higher premium.

If any sort of "unlimited off-peak" gets up, just keep it simple, what has been discussed is getting quite complex.