Being based in JFK for a few years I don't feel it is needed , you land turn off the runway and either go left or right in Alpha ... Nuff said ,all you do is monitor point nine. I think it's a great system...

Now if your China Air cargo , or Aeromexico , then 12 more ground freqs couldn't handle the damage those poor guys do sometimes . It's truly entertaining to watch these poor souls get their butts handed to them. No that I wouldn't do any better in thier countries .

To answer your question I feel
It is not really needed because of the way the taxi ways are designed. It's the inner taxiway or outer and normally they are used like one-way streets. If everyone is on the same page it works well. Atleast I think ..