You have a whole note, you want a crescendo decrescendo. MS makes this very hard to do, as hairpins are dependent on note changes. I got all excited when I saw an articulation called a 'volume swell' in MS 3 that looked like opposing hairpins that you could attach to a note... very disappointed when I saw they were small.
Given that we can't actually use the expression CC to do a swell for real in musescore... can we have an articulation or line that is actually opposing hairpins? It would solve at lot of problems.