I think Apple are very unlikely to remedy this - it isn't their style.
What's your name ? Booglebox ?
From the link you provided....
Kext signing basically works by checking if all the drivers in the system are unaltered by a third party, or approved by Apple. If they have been modified, Yosemite will no longer load the driver.
Quite frankly, given the amount of damage and mischief dodgy kernel level drivers can do to a system, I think its a good thing that Apple requires signed drivers.
No doubt, just like anything, you can sign your drivers .... so its no big deal, just the hard drive manufacturers are too lazy to perform the 5 second process necessary to sign drivers (assuming they can be bothered to distribute drivers for OS X in the first place).