I think it is probably a case of producing a product which meets the first objectives.
Extra's like screens will come with time, I expect no details have been released on the pin outs since they could change or the binary blob is not finalised. Often the lack of info is to avoid people spending money on something which if there is a change, means it won't work (and obviously up-setting people).
As for fitting of the connectors, if they are then great, if not I'm sure I can find a use for the old one if I can't get some fitted, and get a new one when they are.
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