Again an excellent addition!
Could we have some client side sorting and filtering and multiple columns with a visibility flag? I know it is a lot to ask. The reason I would like to see this as it would enable a user to find a resource availability depending on the simple requirements without server intervention.
The idea is that a resource may have multiple properties i.e. meeting room can have a capacity w seats, located in building x, room type y, have disabled access (true/false) z.
Depending on a filter event client-side we could decide in user code if a resource group column is displayed and have different groupings displayed as required. We could then sort depending on the displayed columns for example pay grade or staff name. Ascending or descending depending on the column flag.
A lot to ask but would make the sorting of resource availability very fast in list of resources. That is if you think it is feasible.