When editing worksheets with small text (say 6 points) it is quite difficult to read it (unless you're in that cell and the text is on the edit bar). A simple zoom button will be good for this (similar to excel). Perhaps another thing could be to edit the text in the cell which would be possible with zoom control.
Also, when right clicking on the row or column headers, more options would be great like formatting text etc. To put it quite simply, let's make worksheets just like excel. Merge text, find cell etc, all those cool things. P.S has anyone seen Autocad's attempt at worksheets (excuse the language but it's piss poor)