I struggle with anything that involves all 4 fingers as my index finger is a bit knackered, my pinky is fine as till now I've pretty much used middle, ring and pinky for all the 3 finger chords.The big G, C add9, and Emin7 all sound a bit rubbish as my index finger tends to mute anything it crosses. I'm ok with the 4 finger A7sus4 as the strings the index finger lays on are played in front of it. I'm beginning to tire of Wonderwall, it is, apart from Shallow the only song I actually know using these chords and it sounds awful. The verse chords all sound the same to me and, rather concerninly I dread the 10 mins practicing it. I'm worried that this resulting in the practice becoming a chore instead of fun.