This is also important when I want to scan in a news article from print. Often the newspaper is larger than the scanner so I have to cut the article into two parts, scan each separately, then combine those pages within acrobat. Sometimes, to make the scan fit, I have to cut down the middle of a text column. Without an ability to combine two pages into a single page (within a single file), the news article may be very difficult to read because you would have to switch back and forth between pages to read each line. I don't need any discipline regarding page size. It's my intention to read the article electronically-only going forward. So if the combined page is outside the parameters of my printer, I would just use the printer features to fix that. I think this could be a simple feature. Under organize pages, provide the ability to highlight two pages, properly lined up for merge, then click a button to merge those two pages. Then when you close the file, but open back up, you continue to see the merged pages. One can do this now with side-by-side view, but you have to re-set this up every time you open the file.

Question, can't you select 'Edit Page' create a frame to enclose what you want to move and move it? I do it that way all the time.

If you're having trouble making the frame, start it off the page by clicking your left mouse button and holding it down, move your mouse to the other end of what you want to select then release. This will put a frame around all items you want to move.