What ever happened to "Small tools that do one thing well"?
ImageOptim is extremely well-known in the industry. I'd much rather the developers of my vector drawing tool focus on making a great vector drawing tool, and let [you] obsess over making the best image compression tools. It's not just as simple as just bundling pngquant into the export process. You also have to make an effective UI that implicitly explains to users, "You know that lossless PNG image format you love? Well, here's a slider to make it do lossy compression!"
My preference would be, don't even have an Export For Web option. Or if you do have it, just make it link to ImageOptim!
(Edit: Didn't realize who I was responding to. My team loves and lives by ImageOptim and ImageAlpha — thank you for them! Even if Sketch had better PNG export, we'd still be using your tools as part of our development process to deal with all the other programs that don't get it right.)
ImageOptim is extremely well-known in the industry. I'd much rather the developers of my vector drawing tool focus on making a great vector drawing tool, and let [you] obsess over making the best image compression tools. It's not just as simple as just bundling pngquant into the export process. You also have to make an effective UI that implicitly explains to users, "You know that lossless PNG image format you love? Well, here's a slider to make it do lossy compression!"
My preference would be, don't even have an Export For Web option. Or if you do have it, just make it link to ImageOptim!
(Edit: Didn't realize who I was responding to. My team loves and lives by ImageOptim and ImageAlpha — thank you for them! Even if Sketch had better PNG export, we'd still be using your tools as part of our development process to deal with all the other programs that don't get it right.)