Technical attributes.
Drop-kicks.
Penalty/conversions accuracy.
Penalty/conversions distance.
Kicking from hand, (distance).
Kicking from hand, (accuracy).
Line-out thowing.
Lifting in lineout.
Feeding scrum.
Hooking in scrum.
Driving in scrum.
Wheeling scrum.
Control of ball at the back of scrum.
Control of ball in initial contact.
Control of ball in maul.
Presentation of baul at ruck.
Protection over ball at ruck.
Passing short.
Passing long.
Off-loading out of tackle.
Tackling high.
Tackling low.
Covering opposition player (marking).
Handling, (might be a sort of mix of technique and first touch).
Mental attributes.
Physical attributes.
Don't even get me started on the physical abilities. They would far-outnumber current physical attributes in FM.