I sort of agree. I think it helps the experience to be a little familiar with it beforehand, and also wouldn't say its necessary, but I also find it MUCH easier to watch than read. And more to the point, I find those really dense passages (particularly the ones about the math) very difficult on the page, but not a problem at all in performance (with this production at least). If you just listen closely, I don't think you'll have a problem following what they're talking about at all, even if you aren't good at math or vested in the literary references. I think Stoppard is about how much you are willing to pay attention more than how much you are willing to study in advance, as it were.
A work of art is an invitation to love.