As a statistician working with SAS, often SAS IML, I felt that the improvements made to IML in SAS 9.22 (and 9.3) were a huge step forward - kudos for that.

The only thing that immediately springs to my mind when thinking about improvements I would like to see is an improvement of the enhanced editor. Just a few simple features like telling you which bracket you just closed or highlighting the line on which an error occurred. Yes, I could use SAS enterprise guide but on any computer I have tried it so far it has been rather laggy.