It is incredibly subjective to assert that liturgical dance equates to "ecstasy of immersion in the restorative grace of boundless mercy and joy".  Even people I know who support liturgical dance would call that a stretch.  Dance in praise of God in scripture was a spontaneous expression of praise, not some choreographed, billowy performance.  And, the Mass provides us with another way to participate in redemptive grace.  It's called the Eucharist.  By receiving the Eucharist, Christ unites us to his resurrected self physically and spiritually.  Why would we "strain a gnat but swallow a camel" by trying to equate liturgical dance to such benefits when it's right there before us staring us in the face?  Actual participation in the Mass means participating in what God already provides us in the Mass, not inventing some other shiny object and calling it active participation for its "incarnational" quality of creating ecstasy and joy or whatever.