http://manual.conitec.net/litec_migration.htmLite-C is more like C: less annoying quirks than C-Script, but stricter syntax.
It's not too bad; I converted an entire medium-sized project in 3 days.

P.S.: WED bugs won't be a problem; only the engine got a major overhaul. And remember, you don't have to uninstall A6 to use A7!