Hello,
1. When cloning main reports it should add you ".copy" to your report list. When cloning subreport it allows you to change report parameters, uses selected report as template. So, you change name, data source, report type, looks like adding new one.
Did you get any errors ? It looks like it is working for me. If you get any errors please let me know how to reproduce it.
2. Yap, fixed. It is in coming nightly build.
3. Yes. It is in coming nightly build.
4. This is default, -r ( export statistics is always turned on ).
Please, try nightly build version. If you have any suggestion let me know,
robert