The money is the answer. As discussed in the past, additions such as this do not cost dCS a small amount. For adding DSD256 replay I ventured that it would cost them tens of thousands of pounds. @Andrew Papanikolas corrected me saying I was out by a magnitude.
I have no doubt were you to send them the 10-100K $/£/€ + needed they would be on to it like a shot 
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AndrewAndrew PapanikolasdCS: Programme Manager, Streaming Audio
Yep… except your cost estimate is off by close to an order of magnitude. Once you take into account development time, testing, verification, and support the cost is astronomical.