It would be great if the UI could be more single-user friendly. This might mean a complete UI rewrite ;-) but as a freelancer I wouldn't mind having a less cluttered UI.
For example:
Top bar: has a 'team' and 'me' switch. Remove the 'team' or even the complete switch when there's only 1 user.
Left bar: remove the "assigned to" switches.
General: assigning buttons, watching buttons and specific filters are not needed.
And there's probably more.
Big request, but one can always try ;-)
Cheers
Edwin