Keep in mind:
CC subscription = latest Lr. Ps and Mobile Lr. It does not matter if you only want 1 or two of those...you have the RTU for all 3 for as long as you pay the fee.
LR license = only the version you purchased. This is different than in previous versions such as Lr 5 where you got 5.1 to .57 updates with new features for free. No more free feature updates. And if you wait long enough the version you purchased will no longer work on the latest OS or with other apps and plugins you want to use. A purchased license may legally be forever. But the technical reality is that some day in the future the code is just too old.
That is why I moved from Lr license to CC subscription. I am glad I did. Your milage may vary.
Adobe understands that Aperture is gone so they basically have a monopoly now. Sure you can pay $299 for Capture 1, but with $10 a month from a Adobe, I'm sure they are picking up a lot of users just on price alone. And they want those users on CC.
Frankly they shouldn't even sell LR6 as a stand alone if they are not going to add features in point releases. We are accustomed to receiving these as this has always been the case with software. Adobe basically **** on their users but not being VERY clearly upon purchasing the stand alone.