Davis also made the NIT Quarterfinals in Year 10, made it to the NCAA Round of 32 in Years 13 and 14 with an NIT Second round berth in Year 16.
During Davis' Round of 32 runs, here were the Conference RPI Rankings:
2016- CUSA- 21; Sun Belt-17
2017- CUSA- 23; Sun Belt-13
So Davis accomplished those IN SPITE of being a conference weaker than the Sun Belt. If Marlin were to stay a little longer, can we expect him to give us those same results? Odds are most likely no. Like you said, it's just time to "freshen the pot."