Well, here is some stuff that is easy to miss. Look at the finger position on fret 5 for the A sus 4. What I do and what many guitar players do is move my little finger over to the G string 7th fret and mute the D string. I do this because forming the A sus 4 the way it is showed in the diagram is hard for me to do. Also It sounds fine to me.

Here is a little recording to explain some of my thinking. If I was not so lazy I would have made a video to demonstrate all this.
https://soundcloud.com/planobillydfw/a-sus-4-and-2?si=9e5f2c1e09d747a4aad22c05fe79fd29Correction, I said sustained when I meant suspended 2.
This is a youtube link to the Etta James song I was referring to. "I'd Rather Go Blind"
https://youtu.be/uZt1xKtPbUQI did not play this exactly like the recording because I don't want to have the copyright infringement conversation.
Billy
EDIT: I got to see Etta perform at the Fender Center in Corona California shortly before she died. Bo Diddly invited me backstage and I got to spend a bit of time with both of them. This recording I posted of her at Montreux was played by some of the best musicians in the world. I am glad we have these recordings to remember these unforgitable voices.