As someone who used to worship in the Presbyterian tradition as a member of the Presbyterian Church in Ireland it breaks my heart that PC(USA) are hurtling towards the edge of the cliff.
Actually PCI are quite conservative, they even stopped sending a rep to the Church of Scotland general Assembly, because of the Church of Scotland's acceptance of same sex marriage, even though there is extremely strong historical links between the two denominations. If I still lived at home I would still be PCI.