The new compiler is very innovative and a distinguishing feature, but I would recommend giving a higher priority to package management.
A package manager is more or less expected by developers now, and I bet you will see a lot more adoption once it's easy to publish and consume libraries with an official packager manager and online repository.
IIUC the line of thoughts is that the current compiler is too slow, and that it doesn't show on a small project. But if you imagine a big project with 100 dependencies, you'll be really slowed done. The new compiler is faster (I think there are benchmarks in the repo) and can compile debug builds without going through LLVM.
A package manager is more or less expected by developers now, and I bet you will see a lot more adoption once it's easy to publish and consume libraries with an official packager manager and online repository.