Hello Willian et al,
If I may introduced myself, I'm the lead developer on the FilmLight Prelight software.
It is in fact possible to get metadata for shots (CDL SOP & SAT, tape, clip, scene, take, comment, etc) out of Prelight via ALE, which can be used to import the values into other systems.
You can also use Prelight to generate IDT and LMT+RRT+ODT LUTs in a vareity of formats, which allows colour corrections created into Prelight to be used in other systems. We are currently working on finishing up this part of our export code, so that you can generate ALE, CDL and cubes in one hit as a package.
Obviously there are advantages to using BLGs if you are working in a FilmLight ecosystem, but we want Prelight to be able to work standalone also.