From my perspective as a pilot, I like it. It helps with my situational awareness of what's ahead, and of what's leaving a calling card for me to find. As an example, at KORD they are so busy that you are usually not told what your following till you check in with the tower. I would like to know earlier to sit the F/A's down, bring the continuous ignition on, go a 1/2 dot high on the slope, etc, in case of a wake encounter. By listening we pilots do develop an idea for who is ahead of us by headings given, altitudes issued, etc. If I can deduce the plane ahead is a heavy by ATC addressing it as such, I can get the above items done earlier. As it is now, if I see someone more 2.5 ahead on final I assume its a heavy.