Lost Comm

Flying IMC into Atlanta area (RYY) on the Turbow Eight Arrival, past TRBOW
heading for PUMIF, line of convective activity just NW of PUMIF. The comms
are becoming intermittent with intermittent communications. ATC issues
heading change and new altitude just prior to convective activity (as
expected) and assigns a 360 heading (again to miss some activity). After
acknowledging the new info the comms failed, I'm fumbling around with aux
mic., radar, Nexrad, etc... The end of convection was clearly on radar (on
board and NEXRAD), as well as being confirmed by ATIS from PDK and RYY.
Rather than squawking 7600 I flew assigned heading with a minor zig to avoid
a cell, then was VFR in about 3 / 4 minutes; squawked VFR and headed for
home below ATL airspace. My reasoning for not squawking 7600 was two fold;
1) Didn't want to upset traffic coming into ATL on a busy day with limited
corridors, 2) Could see end to situation in short amount of time. What
are your thoughts?