I did what I often do---I laid a piece of clear film over the art and did some quick pen work---some on the grass in the upper piece of film, some on the figures in the slower piece.
When I laid the inked piece of film over the art, I could see how the additional pen-work might look. Did it need work on just the grass and background?
Or---laying down both pieces of film over the art---on the figures as well?
As a result of this check, I decided to add pen & ink texture to figures, grass, and tree---to everything, in fact. I worked more on the color as well.
More texture, more color...
Finally---a finished piece of trial art. And by the time I completed the piece, I wasn't sure I liked this style for my project after all. Better to find this out by doing a trial piece, rather than discovering it when I'm half-way through the actual finished art!