We are using Trello Premium here at our company. We need to add custom fields to ALL cards in ALL boards and then be able to sort our cards based on priority set on the card in our views.
I really wish / request that views are able to support whatever custom-field your workspace has defined, cross all boards in that workspace.
Reason is that we cant prioritize cross boards and can only use a secondary board with copies of all cards or a view (which does NOT create copies of the cards) - aka single point of truth.
If we had priority field on all cards (tasks/assignments) we could easily make a view pr. employee telling which card to do first cross all boards.