I think lumping together study+modify is kinda awkward, but I also think distinguishing between "share unmodified" and "share modifications" is important. (At one point in my life, I could have told you off the top of my head software that granted one or the other, but that has long ago leaked out of my head)
Waiting for FSFLA to do the sensible thing and declare that there are actually 5 freedoms:
- use
- study
- modify
- share unmodified
- share modifications
/s :P