about : there are not visible the names given on the left sides (horizontal pools)
you can show land header via diagram popup
about : there is not possible to update their overall sizes
by default all pools are "Auto Stretch"
you can turn off “Auto Stretch” for whole diagram via diagram popup option
or turn off for each pool via its popup
about : you change only in “invisible” way and real corners (black lines) stays where they are
Sorry, I don’t get the idea, could you describe more?