I don't think Blow is against big ideas as such -- his language has some big ideas on its own -- but he certainly seems to prefer familiarity and simplicity over mind-altering language-theoretical weirdness.

One aspect of familiarity, incidentally, is being able to hire junior devs. I see that as being a problem with Go -- and, in the future, Rust -- not to mention rocket-scientist languages like Haskell, Ocaml or even Scala, or indeed C++. Go is "simple", but not really that simple, not compared to Ruby or Python. (Of course, this might not be an issue for Blow, whose company is already using C++.)

While Blow was originally talking about safety not being a paramount issue, I believe he has mentioned ownership-lifecycle management, possibly something like Rust's borrowing, as being on his mind.