I would like to hear the reply from you to this first, but meanwhile, I object that the intention to make both simple and "system-level" language looks like a contradiction to me, given how dynamic the language already is, wittingly not improving woes that lay beneath the ground is not going to do any good to anyone (because among all, it restricts the expressivity). Solving this particular downfall - I believe - would not introduce any new complexity on the surface (syntax), and could probably remain hidden for some users.
Also to note: I spent some time browsing this topic and revealed a bunch of pain regarding the dispatch facility (this one makes my skin shiver 
), which started me to consider not to come into swift. I hope that sentiment of unimprovement is not of the majority of the core team.