We develop our tools separately, so sometimes one might be more advanced than the next.
We depend on bindings for most of our interfaces to work. With repeated elements, bindings strategy doesn't work, so we would need a pretty major overhaul to get it to work properly.
The reality is that the code would work if you were comfortable writing the loops and adding the validations by hand. It is the DW user interfaces that aren't prepared to work with repeated form elements.
I could try to explain the intricacies that make it difficult to pull off, but it should suffice to say it is a lot easier than it sounds.