As for the bland side, I think I know what you mean. I have a tendency to superimpose melodies (main melody, counterpoint, secondary melody). As this was my first orchestral piece, I wanted to try the technique of octaves and harmonies (and therefore to limit counterpoints) which can result in a more direct and less rich music.
You learn by doing, and your opinion makes me think I should have used more counterpoint :)
Thank you for your constructive feedback !