Grip is preference and my whole point is the leftover mantra of larger grips sizes from the old days is bogus. There is no right answer, 5/8's works for you, awesome. 1/4 feels better, fantastic.
For me i feel hindered in regards to wrist/forearm rotation and movement with larger grips.
Semi to full western forehand and full eastern one handed backhand. No elbow issues with a 1/4 with an overwrap.