Interviews are allowed at certain times.
Anything past interviews? Like using the time you're supposed to be coaching your CURRENT team in the playoffs in order to talk to and hire your coaching staff at the new job you supposedly haven't even been offered yet by the rules?
Who says that happened? Maybe, just maybe, Quinn had already (during the interview) given them a list of names that he would want as his coordinator and Atlanta went ahead and hired them because they didn't want another team to end up snatching them up and time was running out?
There is nothing to see here. If there was a legitimate chance Atlanta was tampering, we would have heard something from someone by now, especially in this day and age.