That grenadiers officer is a great kit, it's one I'd like to paint someday too!
I'm glad you were inspired by the historical stuff at the WME. One comment on the grenadier, his coat is becoming a pretty light looking blue. If you want to be historically accurate (which you don't have to, it's your figure after all), the coat should be a much darker blue. I had the same issue with the
Polish Lancer I paint a few years ago. I got the same comment about the blue from someone over on one of the historical forums. At that point my reaction was okay, but I'm too far along and don't feel like redoing it. So I let it go and decided to address it on a later project. So, perfectly valid response is to just go with what you've got!
But, if you want to fix it, I'd suggest taking your dark blue and mix in a medium grey to highlight rather than a lighter shade of blue. That's the approach I took on my
Navy Guard Officer and it worked quite well. If you want higher contrast you can add a bit of medium grey and then (at maybe 50/50 dark blue and med grey) start to add in light grey instead. I've done something similar for the dark green coat on my recent
Dragoon. It lets you retain that dark green or blue color while still getting some nice highlights to define the shapes on the figure.
Again, it's up to you whether any of this matters or not. So far all the figure comps I've been to have judged just the painting, not how well the colors match the historical uniforms. If you like the figure better with a lighter blue coat, then paint him with a lighter blue coat! There are definitely times where I'll deviate from historical accuracy because I think it produces a better looking end result.