Personally, I think the new alerts are just plain awful, as compared to the old ones.
Say there are Green Line signal delays at Copley Junction:
Under the old system, the alert would read something like:
Green Line experiencing 10 to 15 minute delays due to a signal problem in the Copley area.
Under the new system, the new alert would read:
Green Line experiencing moderate delays due to signal problem.
And the "back to normal" messages are even worse. Under the above scenario, the old alert would read:
Green Line on or near schedule.
The new alert would read
All Clear (re: Green Line experiencing moderate delays due to signal problem).