Being able to create a report with different page sizes
At the worksheet parameters you can choose to use local page format, but you can only select the orientation (portrait or landscape). I Propose to add page size property when you select to use local page format, being able to indicate Height, Width or ratio.
Dear mdelsol, sorry for declining this suggestion because of following reasons:
(1) On the monitor, you wouldn't have an advantage because of sheet-autoscaling to a maximum display size
(2) It could only be relevant on printers: Here you couldn't choose different paper sizes for an automized print job. You have to handle different print jobs, so hopefully you could also use different REPORT layouts for different sizes.