There should be an ability to set a quota for total complete or incomplete responses to a number
After the quota has been reached the survey could be expired

As the admin for a large limesurvey site i often create surveys for other people but then make them the administrator of the survey and assign them the rights to access the survey
In the survey list i still see all the surveys i created for these people although i am not the administrator, i am the "creator" of the survey
If I could transfer it to the actual administrator of the survey i could find surveys better

Something very basic that limesurvey is missing is a "Total count" row for each question. This is something that people who look at stats require

For example the screenshot example in the limesurvey documentation at
http://docs.limesurvey.org/Statistics&structure=English+Instructions+for+LimeSu rvey
The count will be 6 as indicated by the filter, but would change for multi answer questions.

Also this feature should include the ability to remove the
No answer and the Non Completed rows, without having to filter the questions answers (it could be a global check box "Do not include No answer or Non Completed")