What do you mean by 'lacking'?  Some users have been complaining about the specular values in EZSkin 3 but there are workarounds.  There are some older texture maps when enhanced will do a superior job.  However, there isn't a one-fits-all solution without experimenting first; a skin shader that looks good in a sunlit environment may not look good in a nighttime setting.  The same can be said about what type of shot you will be using in your animation, portrait closeups, or medium- to long-range shots.  Your requirements and shader setup will be different.