Dear SP,
Of course physical separation saddened Radha, untill she Self-Realizes the Truth about Physical reality and Consciousness. That knowledge she experiences , giving "Bliss". The become flute is a symbolic of the Pranavam (Consciousness).

A lover does not enjoy separation, it is only a pain, untill like Radha, who transcend beyond the physical.
hmm

Again from this Truth of Physical, the bliss is same for Aandal and Meera. What Radha enjoyed with a physical human body which is made of electrons and protons , Andal and Meera also enjoyed with a stone idol which is also made of electrons and protons. The bliss lies in beyond this material electrons and protons, which all the 3 shared the same
I understand. Thank you for posting pradeep.