Art that is event that respects the audience. The people who attend should feel welcomed and comfortable (unless uncomfort is a purpose of the work - and this uncomfort should be compensated? thus bringing the comfort/uncomfort into relief?).
Art that is event that is whole and complete.
Art that is encompassing.
Art that is hospitable.
Art that creates a sense of occasion appropriate to its physical and temporal context.
Art that is event that is staged in response to its physical and temporal context.
It is not enough to exist in theoretical isolation which does not exist.
Art that is event to converse with humanity in real true life.
Art that is event that has a beginning and an end.
(I am thinking that related to this is the viewpoint of Kiki Smith that some of her objects are pieces in their own right, but some are 'props' to be formed and reformed into new works of art as the staging or installation demands.)