it seems like we should be able to order virtual columns at the root level, this along with controlling the ordering in the source sheets should remove the need for ordering in slices.
allow copying of virtual columns, would save a lot of time in some cases not having to re-enter sometimes complicated stuff with copy paste which is also error prone
allow copying a virtual column to another table, have a one-time destination table setting defaulting to the current table in the copy dialog
Allow resizing of the columns
The “Type” column wastes horz real estate
Improvement 5 - N) → other ideas?