Just wanted to add my two cents based on my experience.
2019 Edge SEL FWD 2.0, 60k miles. I did a drain and fill a few weeks ago. about 4.5 quarts came out and I put that much back in. I watched as many YouTube videos as I could find on this topic. I am a little handy when it comes to cars than say your average Joe Blow. I watched Ford TechMakuloco when he did a drain and fill on the same engine and he did NOT remove the black fill plug entirely. He only removed the cap which is what I did. Yes the fluid flows in slower but I was able to make it work but twisting and moving the funnel to help it along. I do not see how you can have enough room to get any pliers on that snap ring to remove it. I'm sure removing it would help termendously but I didn't have to.
I'll do another drain and fill next time its oil change time which I also do myself. Next time though, I'll try to remove the snap ring and snap in a fuel line hose to make it more accessible and still use the same cap.