Although you're right that minify=0 would not solve everything. For instance, if the error console gives an error as occurring on a specific line, that won't be helpful if you check the unminified version, and might be unhelpful if you check the minified version too (if everything is crammed onto a few lines).
I don't see the problem. Unless the error is intermittent, you'll get the error with the minified version with a useless line number and then you'll add minify=0 to the url and will get the error with the unminified version which will give the line number for the unminified version.