I suppose it depends on whether the xml/json functionality is 'optionally' linked in to the build by the package maintainer.
The purpose of my post was more to point out that the package name in the x86 dependency list needs changing from libjson-c.tcz to json-c.tcz in any event, even if it's temporarily not actually needed.
At the moment it's not possible to install the bind package under 8.0 x86 without manual intervention, as tce-load fails the dependency check looking for the misnamed json package, which does actually exist as json-c.tcz in the x86 repo.