I maintain it is junk, it has not had a major update in now nearly 5 years and once you upgrade to the next version of OS X it may or may not continue to work. There will be no more updates for new cameras... Junk Junk Junk!!!
Thank you jms969 for your insights. You will always be trashed by the Apple lovers who often will defend the company no matter what. You would think some of these people are married to Apple!!!! Insults come with honesty. Just take the insults in stride. Those who fail to acknowledge the truth shall live in obfuscation! ;--)
I also switched from Aperture to Lightroom which is lightyears ahead of Aperture. It's not perfect, but it is far better than Aperture, especially when it comes to image processing , editing, sharpening, distortion control, local adjustments, keystone controls, chromatic aberration controls and all the other reasons you discussed. Switching to LR was liberating. I never missed Aperture at all.
Yes, LR5 is slightly weaker when it comes to metadata, but that has improved in LR also. But the final image is what is most important in image-editing software, and that is where LR stands out miles above Aperture. Better processing engine than LR is Capture One Pro 8. The images just come out sharper in CO8 on import, but there metadata organization is behind LR, and they don't support the super tells from Nikon (yet.) The local adjustments are the best though, but their are still some bugs. I am having trouble with getting the correct metadata date in CO 8 which is very frustrating.
The thing is that CO8 and LR5 will continue to be improved. aperture has been abandoned. Maybe Apple's "Photos" will be better. I have my doubts. But even if it is stellar, I can no longer trust Apple, thinking that they will abandon it like they have other software. Apple lost a lot of pros, when at one point they seemed to have abandoned Final Cut Pro. They all went over to other software. Final Cut Pro came back, but the pros didn't. And as a working photographer, I doubt I will give Photos a serious try, as once spurned I don't look back. And, professionally speaking, I can't afford to.