Adobe Lightroom CC (no longer Adobe Photoshop Lightroom) is available for download, and my favorite new features are tiny ones… but they bring the file organization workflow just a little closer to what we had in Aperture.
One of the great features in Aperture (but not iPhoto) was the ability to merge libraries. There isn’t a merge feature in Photos, but there is a workaround. This will be critical to know if you want to play with Photos today, then later combine this with your existing Aperture or iPhoto libraries.
The Adjustment Brush in Lightroom is quite powerful and in my opinion much more versatile then the brushes in Aperture. By turning on Auto Mask the brush can detect edges and apply a variety of effects with great precision. This has allowed me to avoid round tripping many of my images into Photoshop saving me time. This has quickly become my favorite feature I’ve gained since moving to Lightroom.
Capture One Pro 8 allows you to import and Aperture library — adjustments and all. This article gives you a brief overview of what you can and cannot expect Capture One to do with your Aperture images once they are imported.