Dear Sir and/or Madam.
I endorse this thread whole-heartedly. Ideally, at least some basic spreadsheet functionality should be present in worksheets. You should be able to cut and paste more easily, you should be able to extend a value or series of values along rows or columns (for example type 1, 2, 3, and highlight further with it automatically filling in the subsequent series - or at least it should be able to populate a single value along a column).
Failing this, I believe a reasonable request would be to at the very least be able to copy and paste between worksheet and standard spreadsheet of your choice. Currently, we are halfway there - cutting and pasting does preserve values and cells from worksheet into spreadsheet. Unfortunately, cutting and pasting back the other direction results in all values being paste into ONE cell in the worksheet. - If multiple cells with the same number of rows/columns are selected when you paste, then all the source information is pasted into each one of those worksheet cells.
I hope the worksheet gets the love it deserves.