Yea, I'm one of those in the "I don't have Bluetooth ('BT') 4.0 / BT LE" boat. I have a 2011 15" MBP that set me back $2,549 to buy. But perhaps what irritates me the most, is not even 3 years later I have to spend $2,599 for virtually the exact same laptop ... solely for a stupid BT upgrade.
CPU: I have The 2820QM (2.3Ghz Sandy Bridge CPU) in my 2011 MBP. The equivalent 2.3Ghz Haswell offering from Apple in the 2014 rMPB is the 4770TE. Real world performance improvement on this "new" CPU is a measly 10% at best:
http://www.cpu-world.com/Compare/69...-2820QM_(BGA)_vs_Intel_Core_i7_i7-4770TE.html
RAM: I have 16GB, and it finally comes standard with the 15" rMBP, so no real world improvement here.
Hard Drive: I have a 480GB OCZ SSD. It cost me $250 to buy aftermarket (still spent less in total than the 2014 rMPB, included in figure above). Finally the 2014 rMBP has a 512GB SSD as standard. I don't count this extra 32Gb as an actual improvement in the grand scheme of the comparison, if anything following the "~10% improvement" trend.
GPU: The new rMBP certainly takes the lead in this arena with the 750M, hands down. One caveat is the rMBP has more pixels to drive so relative performance isn't greatly improved as a result:
http://gpuboss.com/gpus/Radeon-HD-6750M-vs-GeForce-GT-750M
Other items: Battery life - The rMBP is rated at 8 hours versus the 2011 MBP being rated at 7 hours. Yes, the rMBP is thinner, and has retina, but I lose a CD drive, Firewire, Ethernet and upgradability.
Apple REALLY isn't making a compelling case for users to want to upgrade a machine that costs a few thousand dollars only a few years later. Thankfully we may be lucky and be able to upgrade just the Wireless and Bluetooth card?
I understand Handoff isn't the ONLY feature in Yosemite, but I think it's safe to say that UI changes aside, it's virtually the everyday major change to OS X. I would gladly give Apple my money for a new laptop, if there was reason to upgrade, aside from a $15 Bluetooth card