Yeah that is a bit challenging. I noticed that as well. Here is a work around for display purposes. It takes away the object but displays nicely. If you wanted to pass the object further down the pipeline then this work around would be problematic, but it does display what you want...
get-qaduser $username -IncludedProperties displayname,memberof | %{$_.displayname;"$('-'*$_.displayname.length)";$_.memberof | %{$_}}