It's not just order of precedence though, it's that left right shift parsing stuff that lex/yacc/bison/etc do. It makes little sense to me, but that's really what I was talking about. And I'm pretty sure perlop lists the operations as assoc or left — which I assumed was referring to the operator shifting in the parser generator. It hardly matters since there's general agreement that the operations are unreliable. The correct solution is to split up the line (in my opinion).
I wish I had been more clear in the first place. And I wish I'd said split up the line instead of talking incoherently about parens. I actually still kinda wonder if you can get everything to happen in the same order reliably with parens, but it seems not.