Please take some time to read the documentation and see the examples. The omega() (there is no alpha() mixin btw) mixin doesn’t compile to CSS, so debating whet

Please take some time to read the documentation and see the examples. The omega() (there is no alpha() mixin btw) mixin doesn’t compile to CSS, so debating whether it's semantic or not is beside the point. If, after having a closer look, still think that Neat would not be solving any of your current problems, then you are more than welcome to stick to your guns. No tool is perfect for everyone.