The following would be greatly appreciated (seen from my work perspective):
- Creation of tables with possibilities of table line and cell formatiing
- Import of Excel files
- Automatic page numbering
(funny nobody thought about this. It would improve document making a lot)
- When exporting black color to PDF/X use Pantone black C and not CMYK
This avoids fuzzy text when color is not correctly aligned

But let's admit: it must be d.... hard to improve an already beautyful program!!!!