This appears to users as several separate Majordomo installations. Majordomo can create its own lists. If using a supported MTA, Majordomo can provide all required aliases or give configuration instructions. Majordomo can even work entirely without aliases by using the shell interface and the 'post' command. The reasons why address list editing was needed with 1.9x have been eliminated.
Users have access to a large number of personal settings effecting how they receive list mail.
Users can also choose to be informed of their message's progress through the list server, whether their message was sent to the moderators, if it was rejected, etc. It can also interface directly into qmail. The list configuration mechanism has changed. You can still retrieve the config file, edit it, and send it back, but you can also retrieve a subset of the variables and set them without first retrieving them. You can also choose to see the comments or not.