As my understanding before update 4.12.7 blackout affected all the dimmer channels regardless of it being HTP or LTP. Now it only affects HTP.
It would be nice for the blackout button to have a optional mode that enables it to affect LTP channels as it did before.
I use LTP for dimmers, its a lot more practical and simple with my workflow.
As for motors resetting I've never had any problem as long as I have the fixture set up correctly, but I understand why it could be a problem for some.