With the multiple side panels, the UI for features board is a bit small and somewhat cluttered (when writing or reviewing specs for example).
I'd love to be able to stay in the feature details view and move from one feature to the other easily. Although there is a side navigation, it's currently not possible to search for any specific feature to jump to. A search bar on top of left side panel (feature cards) that restrict the list of cards visible in side panel sounds like a good option to me.
Workaround is to use top nav bar which opens right side pannel, then I need to click again for details. That is a lot of clicks in a day...
Cheers!
David