For those of you having issues with ID on El Capitan. One of the main things that cause InDesign to keep crashing is having the Application Frame enabled. Disabling makes it a lot more stable. No issues with Yosemite. Stick to that if you can.
@Makeitmove we have clients on both PC and Mac they both come unstuck when Adobe release an upgraded CC that need plugins to be built on the latest SDK but Adobe don't release the SDK in a timely fashion. They get upgraded and find their plugins no longer work. Fingers crossed Adobe will get the CC2016 SDK out the door before releasing their upgrade. Instead of the usual 2 to 4 weeks after.
Also that lot to shift becomes a lot less when publishers and newspapers start missing dealines.