I'd rather prefer using the old library than the watchdog to reset the board from time to time, when the transceiver hangs.
I already tested the latest library version with the default PulseMeter sketch, downloaded from Github and after 1-2 days it was hanging.
I only have an IR phototransistor+resistor connected to Moteino, which reads the IR pulses from the electricity meter and it worked fine for almost 2 years with the old library, until I decided to update it. I needed to send KW usage corrections once in a while, to make the counting match the electriciry meter.
Anyway, I'm happy that it still works with the old RFM69 library.