Having just jumped all the way from 1.0.4 to 2.0, I've spent quite a few hours tailoring it to the way I want it. Along the way, 2 things I found that may be useful to others are:
1) Try as I might I could not get the online spell checker to work. Finally, as an inspired guess, I downloaded the English dictionary extension and, lo and behold, it now worked.
2) The mail icon is missing (well, it is for me). A bit of searching led me to
this extension which seems to do the trick.