[css3-background] border-radius shorthand syntax

I'm curious about the border-radius shorthand syntax.
http://www.w3.org/TR/css3-background/#the-border-radius

While non-shorthand border-*-radius properties have the following syntax

    Value: <length> <length>? 

where whitespace is the separator between horizontal and vertical radius,
the following shorthand syntax (comma separated) would be more natural
and consistent

    Value: <length> <length>? [ , <length> <length>? ]{0,3}

   (it means: <'border-top-left-radius'>, <'border-top-right-radius'>,
    <'border-bottom-right-radius'>, <'border-bottom-left-radius'> )

rather than the current CSS3 draft's syntax

    Value: <length>{1,4} [ / <length>{1,4} ]? 

   (it means: <'border-top-left-radius-X'> <'border-top-right-radius-X'>
    <'border-bottom-right-radius-X'> <'border-bottom-left-radius-X'>
    / <'border-top-left-radius-Y'> <'border-top-right-radius-Y'>
    <'border-bottom-right-radius-Y'> <'border-bottom-left-radius-Y'> )

where '/' is used for separator between horizontal and vertical radii,
and the comma separated syntax would be upper compatible with the old
draft's border-radius syntax
http://www.w3.org/TR/2005/WD-css3-background-20050216/#the-border-radius

    Name:  border-top-right-radius, border-bottom-right-radius, 
           border-bottom-left-radius, border-top-left-radius, 
           border-radius
    Value:  <length> <length>?

that was already implemented by some vendors (including webkit, Prince,
Antenna House).

Is it too late to reconsider about the border-radius shorthand syntax?

-- 
Shinyu Murakami
http://www.antennahouse.com
Antenna House Formatter
http://www.antenna.co.jp/AHF/en/