As you say, this is very much a question of personal interpretation, but if you read the sentence out loud, to me it feels the slashes convey perfectly the kind of pausing you'd need for your 'deadpan' effect.
Maybe I didn't mean business-y, maybe I meant too cut and dried or scientific-appearing. (I think I have my own label system: deadpan, business-y, etc.)
What's really annoying is when people actually say the word "slash", as in your (and my) sentence. It's meant to be silent--though implied--in conversation, in my opinion. Saying quote/unquote is okay, but not slash! :)