Although the Mesh Strip Editting Tool command was added back to achieve a separate rotation, the following Distribution Per Strip, Hairs Per Strip and Volume Per Strip could not be controlled separately.
I tested this with the latest nightly build and it seems to work as expected. Per-Strip settings can be tweaked if you enable the "Mesh Strip Editing" tool and select a mesh strip controller in the viewport. See the video attached for a demo.
If you still experience this issue after following the instructions, try to reproduce it in a simple scene with a couple planes and share it here. Also, see if you get any error or warning in the script editor.
