The "feel" difference alone for me makes graphite well worth it. I laid down an absolute beaver tail of a divot the other night (like a solid foot long), chunked it harder than I had ever chunked a shot before. Normally my hands/arms would just be stinging if I did one of those...... with the graphite shaft all I could feel was the shame from taking such a terrible swing LOL.
Feel is definitely good, for me it's more height with my swing speed. I want to get in a few more lessons though to be honest to see if that improves as I work on my downswing & weight shift.