In Cataclysm we had Dark Archangel - so we actually did have a DPS cooldown going into MoP which we lost this expansion.
Overall, I do agree with the argument that as a sustained damage class - having strong cooldowns is problematic for balance, and will most likely make us weaker overall.
With that said, I think we should start with full Orbs - over a 5-15 minute boss fight the damage gain is trivial, but the feel of starting every fight without them is just 'not fun' and makes us feel hard done-by (and rightfully so even). Starting with orbs would make the class feel more 'fun' without really altering our overall DPS: that's the sort of fix that should be a no-brainer.