I don't want to use the Service Port\OOB Interface Gig 0 for Management.
The preference is to use 2 x 10GB Uplinks in a Port-channel between the WLC and Neighbouring switch for my Management and WLAN Vlans.
This config matches exiting 5508 WLCs. On the newer 9800s are there any restrictions which would prevent the use of this configuration?
Yes you can.
Day-0 config only allow you to configure Gi0 interface or routed interfaces.
If you want to configure an SVI for management, you need to skip Day-0 config wizard and configure it in traditional way from CLI.
If you want to configure different physical interfaces for production andd management, you have to skip Day-0 config wizard.
From my point of view, Day-0 config is a basic setup for non-advanced users.
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And don't forget to set the wireless management interface VlanXXX, or your AP's won't connect to the WLC.