In Beta 11.10.4, SFTP didn't work for me anymore, no matter what I tried (see SFTP doesn't work for me in DOpus 11.10.4 Beta). Jon sent me a fix, and now SFTP not only works again, it's also much, much faster than before. Instead of a download speed of 1.3 MBit, I now reach just under 11 MBit - not as fast as WinSCP, but something I can work with.
ExpanDrive is still as slow as before, though, when I use it in Directory Opus. Not sure what is slowing it down that much.
Cheers,
Jan