I don't think historical data really adds much ....."oh, you used to get the full 80Mb
I believe it could add some value. For example, if historically your line ran fine for X years at XMb (80Mb or 10Mb doesn't matter), a problem occurred, problem is sorted, you end up banded be it losing 1Mb, 10Mb or 50Mb if the customer gives a reasonable case (be it stats, weather event etc) for a reset they should get one.
No need to miss a days work waiting for an engineer, no need to miss another days work as the first engineer didn't turn up, no need to endure the engineer say the ISP can perform a reset why was he here, no need to hear that your internet running 30% or worse than what it should be is acceptable, no need to beg the engineer to reset your line anyway, no need to hear the engineer say XMb is plenty fast enough you don't need more, etc.
I am all for what appears to be positive development of allowing a reset to be "automated" and requested by the ISP but I am not sure it will have much benefit as it could do unless a bit of relaxing of the rules is applied by both ISPs and OR (who knows that may be the plan anyway).
Eg: Why shouldn't "max" get a chance to get his missing 7Mb back if he has stats that says his line supports it?
Why shouldn't the (edit: different) person who now has vectoring on his line get a reset so he can get the extra speed?