As far as people on the ground go – most see the division as a political/hierarchical division, rather than one of faith. Most Orthodox/Jacobite/Malankara Catholic laity seem to attend each other’s events and Liturgies freely, as do most priests, and even bishops. The heads of each even attend each other’s events - except the Syriac Orthodox and Indian Orthodox are not seen together, although, after the election of HH Ignatius Aphrem II, even this convention was done away with and both were seen together numerous times embracing.
Between the Syriac Orthodox and Catholic Church, there is already an inter-communion agreement, as well as pastoral care agreements. Conversations with Indian Orthodox and Malankara Catholic continue. The relations between Indian Orthodox and Syriac Orthodox ebb and flow, from positive to poisonous. Marthoma Christians are generally regarded as protestants by all three Apostolic Churches, although individual parishes or priests may try to reclaim their roots, but then shift back to their Anglican and protestant friends to avoid the appearance of reunion (I suppose). The Malabar Independent Church is in communion with the Marthoma, even though the MISC claims to be Orthodox and HAS NOT altered its Tradition, while Marthoma has and refuses to pray certain Traditional prayers.