That's understandable regarding stability and performance for the general masses. The limitation is not really a limitation in using Lua, just the design of the app?
I just want to make sure my point gets across to the user base that understands privacy and security about the benefits that were achieved by XPrivacy up thorough Android 5, where some of the potential exposure and risk is with Android, and how some limited knowledgeable users used them to protect themselves and monitor what their apps are doing with ease.
I do really appreciate your work XPrivacy and XPrivacyLUA!
Related is that in XPrivacy restriction were selected by uid and in XPrivacyLua by app, which makes a big difference when apps are bundled under the same uid, which is typically the case with system apps. In XPrivacy you could only restrict all system apps, in XPrivacyLua you can restrict only one system app.
Summarized, it is just a different approach with other advantages and disadvantages.