Thank you, everyone, for the input.
I’ve spent a while looking at the possibilities, and, whilst I think there’s a lot of value in creating a Projucer-free CMake build system, adding a CMake exporter to the Projucer is much lower hanging fruit - we would be able to do this relatively easily and it would let people use CLion straight away, without significant additional configuration. Ultimately, if we have the required CMake infrastructure in place, we could then migrate this exporter to use new CMake functionality later on.
Unfortunately this work won’t remove the Gradle dependency.