It's an interesting conundrum. Profitability and accessibility seem to be zero-sum in the game, and Engineers have complained for years that the profession was a complete money sink because they could sell so few items or services. I'm leveling Engineering on my Warrior right now and it became apparent pretty early that the profession lacked the usual lucrative items available to others; there's no real equivalent to Tailoring's bags, Leatherworking's armor kits, or Alchemy's raid potions. I've made money selling Mechanical Squirrels and that's it. So while I understand where Deftek's coming from, I still think the profession would benefit greatly from the addition of marketable BoE items, and Engineers have just been handed something that basically sells itself.
Having said that, a mount isn't an equivalent to, say, super mana potions or golden spellthread; you buy the motorcycle once and you never need to replace, consume, or update it, so the market for it will never extend beyond these one-time purchases. So while Engineering needs more moneymaking items, from an economics perspective the mount isn't a good choice and possibly should be BoP. But it sure looks cool, and I'd love to have one on my (non-Engineering) main.