Acrobat DC 2% free rotation

I publish scans of public domain music. I use Acrobat X all the time in my work, and cannot use Acrobat DC because the automatic deskew in DC is tied to text, and the manual deskew has a minimum rotation of 2%, much too large for deskewing. I'm writing a book about music score preservation and would recommend Acrobat X for use with this, but will need to tell people not to even try the cheaper, easier to get Acrobat DC because of this deskew problem. I don't see any other solution to this besides asking Adobe to make the free rotation tool a lot more precise. Any comments on other ways to do this, or ways to actually contact Adobe about this?