so new thing once the wrench is added, the ability to rotate stacked blocks individually, so like with slabs, this would be possible;

From the logic side this is already possible but there is currently an issue with the model manipulation that causes certain texture rotations to be nullified. I am currently looking into fixing that.

This is now fully implemented and will be included in the next version.
Thanks again for reminding me of this, I had totally overlooked the "unrotation" workaround I had in place that would have made this feature kinda pointless :D