It works.
It works WELL.
Don't change it.
My first flying job involved a night mail run into LGW, and it made getting about a doddle. Daytime by contrast was an absolute nightmare.
Now I'm LHR based and really like the reds and greens. The only snag I've had was when an inexperienced lights operator removed the runway exit lights just before we got there, and the tower gave me a bo*****ing for not coming off fast enough and nearly sending the next guy around. However a swift apology, plus explanation was given by ground. All in all its so much easier to use than trying to look for taxyway markings on a wet night. And when the frequency is rally busy, it keeps you moving, without guessing or adding to the chatter.
KEEP IT