Hi there,
We sincerely apologise for the delay in responding to this thread! We are working on improving our responsiveness to the community, particularly our feature request process so appreciate your patience in advance!
On that note, as we pull together all the votes associated with this topic, we would love if you can redirect the votes on this thread, to the primary thread (most voted) here: Really need to mirror subitems across boards, as we plan to close this thread so we have we have all the votes in one, and can better prioritise this feature request based upon the total amount of votes 
Thank you!