I sure hope it will improve. The SDK is functional, but lacks the simulator we had for Harmattan. But there should be much more documentation, examples and guides. Currently only Silica is documented. The rest is limited to some pointers to Nemo and Mer (which aren't comprehensive as well, documentation wise), and to the Qt-documentation.

I'm writing an app for Jolla, but much of the time is spent on searching for documentation. And when (if!) I find it, it's more than once generic Linux stuff which may or may not be applicable or available on Jolla. I'm a developer by profession (totally different platform though), I have some Linux experience since I use it on my pc's at home, but still it's often frustrating trying to get something to work.