Been testing 3.3 extensively over the weekend. It's a solid release and there's little to complain about.
Two things though I believe need some attention. First thing is the way cloud shadows look in visibilities below 25nm. There's two issues: first, the shadows aren't influenced by X-Plane's haze / scattering (same is true for clouds, but usually it doesn't disturb much), making them look out of place (almost hovering) in the distance. Second, they somehow get cut off in the distance. Both issues are clearly visible in this shot below. I suspect this is an issue with the way SMP handles the shadows and probably not easy to fix - but could you provide a work-around, for example a lowered radius the shadows are drawn? Right know, the only option is to turn them off...
The other thing has been discussed before and I am happy you're still working on "it". The Cumolonimbus. Well, to say that this fella below sticks out like a sore thumb would be an understatement. And then it bleeds oil. On top if that, it was flickering. Really, no. How about just using a large, darker cumulus, that blends in better with the rest of the clouds and doesn't make people scratch their heads.
Keep the target hot guys.