Hello,
If you want to keep C-Script code and still use Lite-C stages you can easily combine those two. I'm using both in my game for the very same reason.

Only set-back is that I wasn't able to use game_load because PPE is simply not active after that instruction. On the other hand level_load works just fine so I have replaced game_save with simple save system that uses file_var_write and everything works just fine.

I would consider it if you wanna keep C-Script and still have nice looking PPE in Lite-C.