GPS does have several substantial limitations, so this isn’t necessarily a step backward so much as it is an alternative. For my money I’ve been using the Polar 800SD this season and with the ANT technology contained therein, it is dead on accurate.
Ah, but I like my maps. Or being able to put it in a baggie and under my swim cap. And I don’t trust pedometers. You can use a pedometer with the 305 if needed.
To me, the obvious solution is to combine the foot pod with GPS. Write some smart software and continuously calibrate the foot pod measurements with the long term GPS solution. The pace would be accurate and the long-distance measurements would be accurate.