Sure, but my point was that some such YALs are just overgrown DSLs (cough UnrealScript) that find themselves facing the same kind of design problems that have b

Sure, but my point was that some such YALs are just overgrown DSLs (cough UnrealScript) that find themselves facing the same kind of design problems that have been solved decades before by more forward-thinkers. In this case, these are good designers with decades of deep experience, and who I expect to have solved many design issues already.