Tiled background tile randomization; Increase free edition scripting limits; New script APIs & more.
I don't mean to dismiss your point, beginners do get attracted because of the event system, but many people don't sleep on the more advanced features when they improve their skills. No one's pushing us to code. However, if you know what you're after, learning JS will increase your productivity and expand your options when working on large complex projects.
On many occasions, Ashley has gave us clues that the event system is pretty mature by now (since C3 runtime maybe?) and there isn't much to add to it without breaking something else.