Multiple rar archives extraction is very inconvinient
UPDATE: This concerns rar (probably, some other formats too) archives, multiple zip archives extractions works good (singe button in headerbar shows extraction progress for all selected archives).
Extracting multiple archives is very inconvenient. When you select archives and use "Extract here" option, I think, nautilus consistently launches file-roller for each one. Each file-roller instance shows "Extracting progress window", and when the archive is extracted it shows "Extraction compete window". "Extraction compete window" doesn't disappears, so if you extract 10 files, at file 8 you'll have 7 "Extraction compete windows", each one of them is a separate instance in alt-tab switcher. Moreover, if you move to another workspace while extracting multiple archives, you'll be constantly disturbed by Extracting progress" and "Extraction compete" windows.
Also, if you press "Close" button on "Extraction compete" window, while there are more archives to extract, the process stops completely (file-roller crashes file-roller#55).
Possible solution can be using the single archive extraction behaviour for multiple-extraction case (button appears in headerbar with progress circle). It can show something like "Extracting archive 3/10". Definitely, file-roller windows should only appear on 'error' or 'the whole process complete' events.