You can work on your dynamics, articulations and phrasing by practicing a phrase on one note. It can be any note you feel comfortable with. You can for example play the whole passage on a B flat if it's the first note. It will sound a bit silly but it really works.
When you practice on one note, you don't have to worry about hitting the notes and you can focus on all the other things that you need to play musically . Try to make the phrase interesting and musical this way and then play it with the right notes. You should have a much nicer phrasing and sense of direction to your phrase after that.
I am associate principal horn of the Singapore Symphony Orchestra and the author of the progressive methods. I'm happy to share my experience as a horn player and teacher with you.