The MQMs I was referring to were on the DL Plat Amex, not the Bus Plat Amex. I just have the regular points on the Bus Plat Amex. The DL Plat Amex offers 2 threshold MQM awards, similar to the Reserve card. 10k MQM at $25k spending an another 10k MQM at $50k spending. I spend (charge) just over $50k annually...but not over $60k...so I would lose 5k MQM if I switched to the Reserve card. It's all so complicated!
With the Bus Plat I have Sky Club, but also the other airlines, but then again, I only fly Delta, so why not just join SC? Which is my thought...I'd be able to access AS Board Rooms with SC membership...which will come in handy in a couple of situations for me.
So...sorry if I confused you on MQM.

Solely getting them from DL Plat, not regular Bus Plat.