Hi All
Thank you everyone for the feedback.
For starters, I have passed on to our content team to look into the seasonality of the trees. It's worth noting that, for snow, some trees/shrubs may be intended to represent evergreen trees in snow and as such may have leaves. However I have asked them to double check that this is correct for the available trees.
In regards to wind animation; the Plant Factory/Treez system does not currently support this, however it is planned to add this in future; the first goal was to ensure that the new materials and imposters are working, and to tweak these based on feedback for future.
Regards