Of course common integer is a better system. You just have to keep in mind the lack of precision that might make certain people even more confused. 16:9, for instance, not actually being 1.78, but rather 1.7777777777...
And 17:9 is used for the whole integer aspect ratio describing a 2K DCI, right? That's just a whole big mess. 17:9 = 1.8888888..., but will be shortened to 1.89, 1.9, or just referred to as 1.85.
I'm not sure anyone with a physical film background ever really gets confused by these terms, since knowing measurements of the recording medium down to the hundredth of a millimeter usually accompanies such work.