ROCK is a locked down OS and cannot be modified in any way by the end user. For ROCK to have the new Intel WiFi drivers, Roon will need to integrate them into the ROCK build. The only ones who can answer when or if that will happen is Roon themselves; and they have already ready been notified earlier in the thread. So be patient until they can respond.
Imho, I doubt that they will patch in the drivers and put it through testing in any short time frame. So, if you need to get this build done “now”, then I would suggest a Linux build like Ubuntu where you can load the drivers yourself.
The Nucleus OS is different that the ROCK OS. There are features in Nucleus that do not exist in ROCK. Also, the lack of WiFi was a choice made by Roon when designing the Nucleus, not as a side effect of the case or other engineering limitation.
Please read the Nucleus white paper for more information : https://docs.google.com/document/d/1pUj-yFsAHPgTuV1TbcESA4va1_mxv1M_VQPJV___nuQ/edit#.