Does the MAF sensor control anything other than the EGR valve?

nope

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.

I'm not too sure about that.
A person here had a SEGR module that got full of water (don't ask) and boy did it screw of the performance of the CRD.
This person had all kinds of weird things happening, including very poor performance.
I'm sure others will have other interesting stories as well.

I've been running the ORM for the last 21,000 miles - since it was first discovered. Only difference in the way it runs is more noise and less hesitation. That includes some impressive dyno runs too.

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05CRD: GDE Hot ECU & TCM tunes, Provent, Cat filter, Facet lift pump, TransGo kit, Florida TC, Samcos, stainless brake lines, HDS thermostat, Renegade light bar,
Bilstein adjustables, Al's Gen 4.5 Arms, 235/85-16 Duratracs, DTT rear, Elocker front, EVIC+TPMS, Turbo timer, McNally pillar gauges, Weeks Stage II kit.