Hey SMJ! I love detailed feedback like this.
The base was a lot of fun for me. I've been drooling over really neat bases that I've seen under "other" people's kits, so I figured it was about time I tried one! The oval base was definitely intended, both as a nice offset to the angular scout car, and it's impossible to mistakenly arrange lines in parallel with the base if it's curved.
The grass - had thought about adding more, but I wasn't sure that anything like that actually existed on the African plains...seemed about the right colors, and I figured "desert sparse" was probably the safest route for me to go. I definitely wanted a vertical element, hence the addition of the road sign as well.
Top mesh is indeed PE, comes included in the Tamiya kit (along with the main gun barrel)! This isn't the NEW new 222, but the OLD new 222. As in, not the original release. Get it?
I'm still contemplating firing a thinned coat of buff on the lower half, perhaps if I wrangle up a decent photo setup you can see what it actually looks like now, instead of just shadows. It may indeed have enough already...you just can't see it.
Again, my thanks!