Existentialism may provide a viewpoint for some people that amounts to an advance, a deepening or broadening; but for others it may amount to limitation and error. When viewpoints are released, the wisdom that is unveiled is much more profound and much more responsive than any philosophy. Ultimately, viewpoints and ‘isms’ have to be let go of completely.
The meditative worldview is not cobbled together with ideas and arguments, but is seen directly, or rather reflected directly with the clear mind — the mind that is free from dependency on any view, any concept.
If you are studying within a tradition, and that tradition provides a view, you should strive to fulfill that view. But ultimately you shouldn’t hold or make anything. Even just saying ‘universe’ is a mistake.