Can confirm, as of July 28th, 2015, this is still broken. Changing data in an array of structures does not work.
Majorly bummed out about this. Will have to halt production until it is fixed.
They could fix this one issue and call it 5.0, cause that’s how big of a deal it is. It literally is a bigger issue then anything else. Being able to have structures in an array and being able to change data in those structures contained within structure array is imperative, like outright engine breaking not to have.