54mm Napoleonic Württemberg light infantry finished, and advise needed

 Hi guys

I consider myself a journeyman when it comes to painting, I have been painting seriously for 30 odd years, my strengths are being able to paint large batches of figures reasonably quickly to a pretty decent wargaming standard, I have started a 30 odd year dream of collecting a 54mm Napoleonic display figure collection, using 3D figures as the medium.

I am not a display figure painter, I don’t have those natural artistic talents that many display modellers do, no Bill Horan, so this project will be an attempt at improving my display painting skills.

So, where to start? I did this first batch of figures using my typical wargaming painting style, with a little extra work on the faces, this is my baseline that I want to improve from, I have yet to add foliage to the bases, I’ll do that tomorrow, so what advice would you give me to improve? Names of painting techniques, and links to tutorials are appreciated, what is your favourite technique, and paint medium? These were done with Vallejo acrylics, I have a huge collection of acrylic paints, so I would like to start there, but I am open to looking into other types of paint, I would prefer to stay away from airbrushing, I have an airbrush, but I find the set up and pack down too much of a deterrent, and only use it for large batches of vehicles. 

Should I try and keep this style but improve on it? Or change techniques entirely? Looking forward to hearing your advise. 

These are 54mm Napoleonic Württemberg light infantry figures, printed by myself, using piano wargames files, they are next to 28mm figs for size comparison, they were printed at 190%.

Next I will do a Bavarian gun and crew.