At Blackboard we developed yet another DnD library only because existing react solutions were not accessible - https://github.com/blackboard/react-dnd-ax . But unfortunately it is not quite "performant".
Since then I found another promising library which while not fully accessible, provides great deal of keyboard interaction (last time I checked it in February - library is under very active development) - https://github.com/atlassian/react-beautiful-dnd
We are still on a lookout for well performing solution for react, yet fully accessible..
It worked right off the bat for me while react-sortable-hoc did not.