First, what you should 'do' is get all of the information. Keep reading.

I think you mean "MAF". Low fuel pressure WILL cause what you describe, but so will other items.
The fuel filter is also your pressure regulator. But the pump has to work well enough to provide 58psi at ALL times. A spotty or pitted fuel pump relay on the RCM would be a cause, as would an aging fuel pump.
There are gauges you can put on the car and watch your fuel pressure in real time, but they are expensive, I found one for $170, electric, easily installed. But didn't feel compelled to spend the money.

I find it silly that there is no fuel pressure monitoring, the ECU just assumes a pressure of 58psi and goes from there, if fuel pressure is dropping, the ECU has no clue other than looking at the O2 sensors, and thats not a really good indication of how much fuel is being delivered. But my truck and motorcycle are like this as well. A simple pressure sensor would enable the ECU to set a code if, at ANY TIME, the pressure was too low or too high. Why do all manufacturers seem to leave that out?

With not codes other than MAF/MAS, my question is this: WHAT code?
"All it showed was a MAS issue" is not complete information.

What code did you get, and was it MAF or IAT? (I ask, since the MAF assembly has both sensors in it.) This can tell us a LOT, for example, a "malfunction"code often means a connector is corroded or bad, or, if it shows all the time, you may have the wrong part in there.