I think they'll fix it soon. After being criticized from
Forbes, Kotaku, and GameInformer I think they get the message. Anyways they did announce they will have a subscription plan in the final release and everyone will probably just use that.
Sony Blog:
Though back on topic I would prefer they release a PS4 port for 1.5 and 2.5 as well but if it comes out I couldn't imagine it being until late 2015 early 2016 at the earliest. Sony told us we'll get new games on PS Now and if you intend to use the subscription service it's close enough to being able to keep them. The same way you wouldn't buy a dvd boxed set if you have the series on Netflix. I would obviously prefer to play KH on my PS4 but if I could play 2.5 this fall on PS4 with a reasonably priced subscription I'd be happy with PS Now.