LibreOffice default toolbar survey results are out! The short survey was conducted some days back.
Based on the survey results, the proposed toolbar is developed as below:

On the question “Do you agree with hiding of clipboard functions from the toolbar?” the results are below:
Options | All | Short-cut users |
Other methods |
Yes | 117 (49%) | 96 (53%) | 19 (35%) |
Yes, but keep paste visible |
39 (16%) | 28 (16%) | 11 (20%) |
No | 81 (34%) | 56 (31%) | 24 (44%) |
And for – Do you agree with hiding the paragraph background color button in the toolbar?
Options | All | Toolbar buttons |
Other methods |
Yes | 81 (34%) | 44 (24%) | 37 (71%) |
No | 138 (58%) | 127 (69%) | 10 (19%) |
I don’t know what you are talking about |
18 (8%) | 13 (7%) | 5 (10%) |
And based on survey results, probably the cut-copy-paste icons would be removed from default toolbar. The changes are expected to be in LibreOffice 4.5 release. Personally I think the paste icon should be kept.
For advanced users, the toolbar always can be configured based on needs.
Read here the detailed coverage.