Hi Doublet,
I’m glad you were able to get your installation working, but if you’ll allow me, I have a couple of suggestions.
The cover’s state should be maintained between restarts.
For the grey issue, I thought that should not happen with RFLink covers either. You can try to customize the assumed_state attribute to True:
If you want to control ALL the covers at once I recommend that you create in HA another cover to rule them all. This new cover can be paired (the same one) with all your covers (once every time). This way every cover could be controlled 3 ways: the remote, the ‘individual’ control and the ‘group’ control.
You could control all yours covers with a single command without the need for delays. And can keep the individual control of any cover.
And the last one. Maybe you want to take a look at this CC:
This is not a suggestion, but in case anyone is wondering:
This setting is in the documentation too: