Crystal can go directly and so avoid a universe. It was originally designed as a stand along and the universe was a resent addition.
I'm pretty certain WEBI can't bypass the universe. It was always designed to work on a universe.
I'm also pretty sure Analysis does not even have an option to use a Universe.
Have a look at slide #9 in this deck
http://www.slideshare.net/emceemouli/best-practices-reporting-on-hana
Cliff