The Affinity Photo public beta is available for download right now, and it looks like it has a lot of potential. I spent a few minutes with it and it actually reminds me more of Capture One Pro than it does Photoshop. It is a Beta, so I've crashed it a few times and they clearly have some kinks to work out. For instance, I have run into a lot of modes, which prevent you from performing one action because you have to perform another first. Though, that may just be part of the learning curve, but it feels like using an old version of Photoshop in a lot of ways.