I really am enjoying what you've written so far. The religion being in control of technology and healing reminds me a bit of the Foundation Trilogy by Asimov.
It's kind of the same. In this story the Kumlati view is pretty much magic-rules-everything. In Asimov science mascuraded as magic, here the magic is real.
The Kumlati have relatively little scientific technology. Now that the humans brought them some tech, the rich and/or powerful have electric lighting and electric powered water pumps (some even have computers on par with late 90s computers performance-wise with a crude version of the internet). The poor might have electric lighting if they live in a big city. All city temples have a radio transciever which only they can use. Human slaves maintain the machines based on their technology, since no Kumlati would lower themselves to learning about "mundane" things like science.
Although the rebellion is a bit behind in magic, it tends to accept scientific technology more than the government, which gives them a bit of an advantage. (they have automated factories, automated mines, and micro-fusion/nuclearelectric power, not to mention computers and occasionally (if they can salvage enough from the destroyed colony fleet) holographic training, projectile/energy weapons, shield/cloaking generators (for the camps only) and FTL communications. The FTL communications, since they are based on quantum entanglement, allow the rebels to communicate without their communications being intercepted. I will probably have them build a single FTL ship about halfway through the book (The humans on Earth tell them how. Message pod leads to Quantum-Entanglement (QE) tranceivers, which lead to Eath giving them Hyperdrive designs. The Rebel's design will be crude, slow (maybe 600c-700c while Earths slowest are 900c-1200c), and built mostly from salvage, but it will work).
In case you're wondering how they could destroy something in orbit without science, some of them can astral-project into space and take them out with their powers.
The leaders of Earth don't help out of the goodness of their hearts, though. They want to learn magic so that they can use it to gain more power (and prevent colonies from seceding from the United Earth Alliance). Earth is practically out of useable natural resources and has to use resources from the colonies to survive. The total population/military strength of the colonies is low enough that Earth can maintain some control with the few ships the Solar colonies can build from their resources, plus a few percent of the taxes paid by the colonies.