I'm currently trying out Lightroom/Photoshop CC. Having not found much of a difference between versions of LR, and it actually being slower, I'm considering not purchasing. The problem is however, part of my trying LR out has been editing some photos from a recent shoot, and in attempting to open these in LR5, it became apparent that they're being saved to different and incompatible catalogs, and so essentially, any editing I do in LR will be lost should I not subscribe. I'm wondering if there are any solutions to this other than exporting said images from LR and then re-importing them into LR5. This does make trialing LR seem like a bit of a trap though.
You can try saving metadata to the files in Lightroom CC. Then import the images into LR 5 and read data from files.