DCC is stuck in the stone ages. They haven't updated their tournament software in 10 years. They still don't even record match scores. Their matches take forever, rarely start on time, and the scroll on the phone app is hit or miss every year.
I don't care what format they use. Buybacks/elimination/redraw/whatever, does not matter. Matchroom runs their tournament an order of magnitude better.
Maybe you can say well MR has 50 times the resources. That may be the case and the reason why. But regardless of the why, there is simply no comparison in the final product.