I think you've done a nice job overall. I like the tones and the weathering but I have a couple of suggestions. The kit tracks look to be about a length or two too long. I know I've had to shorten them on other Dragon Sherman kits. I don't know if it's the lighting but a few of the tarps look slightly glossy and the camo net that is stowed on the left hand rear side stowage box would drape over the track tension idler wrench. It appears to be floating right now. One other item that caught my eye is the logs on the side are only held on with one chain. I don't think they could be supported with just one chain in the middle, they would want to pivot up/down most likely. Maybe add another chain to the next grab handle.
