I fail to see the difference. Rather than adding a line, you add a few numbers to the end of an existing one. Not terribly difficult.
Personally, Id rather add 0 256 0 5 to a texture instead of adding a texoffset and texscale line. It saves space and there is less to type, and with less to type comes less possible errors.
And it isn't THAT hard to remember what four values are. If worse comes to worst then add a comment saying
//1. Rotation 2. X offset 3. Y offset 4. Scale Multiple
Or even throw in a link to the docs. :D
Either way, just trying to help. My opinion on what's I think is better isn't needed I suppose. But all the same, ^^ you using texscale and texoffset would also be personal preference. ;]