Aw man, no mention of Funciton :) [0]
I believe I understand where the designer is coming from. Traditional languages use a 1D syntax to express a structure that is really not 1D (the parse tree). However, I don't think it's really 2D either. If you think about how an interpreter would have to proceed to execute Recto code, it would still parse it into an internal representation and then execute that, and this internal representation no longer uses the 2D layout of the code.
I'm not implying that it's a bad idea or anything. To the contrary, I think Recto is a cool idea. I'm just skeptical that simply making a language syntax two-dimensional automatically makes it easier to understand, code in, collaborate in, or implement a parser/interpreter/compiler for.