Is it really that fast now? I wonder what that does to people who were using PB ST. (This is a serious question; my computers don't do video very well.)
Anyway, where I'm coming from is that I view good DPS as a habit, not an opener; I obsess over getting optimal openers and rotations not because optimality is possible but only to the extent that it forms good habits. There are many superstar DPS rankings (any MMORPG) that quite frankly don't do what is optimal because they have a strong set of enough good habits that it doesn't matter. My melee partner for two years does himself use a Form Shift opener. It comes in handy because this is a distinct likelihood: PB > Lightswitch rave at NSA datacenter > Snap-Snap-Snap-Snap um where'd PB go. In a situation like that, his OODA loop is well oriented to continue with a no-PB opener, where someone who did not Form Shift would need more GCDs to achieve GL3.
Monk, more than most jobs, involves keeping your head in the game. Everyone else stands around popping fireworks during a 2hr? This is permitted unto them, but monks are a li'l busy with Chakra and Form Shift. I see benefits in extending Form Shift preparedness mentality to a Perfect Balance opener, even if it isn't strictly necessary. It isn't strictly necessary to maximize our DPS either, but with the view that good DPS is a habit and not a conscious decision, we try (in part) because it feels right and comes natural. So if this is not how you function, you do you, don't fix it since it's not broken; when Bruce Lee says, "the easy way is the right way" he does not mean to be lazy, of course, but that what comes fastest to us and what benefits us the most need to be in alignment, rather than to be tied down to a style.