Yes, we dont have more further sub categories.
No offence but some member has posted about Hussain Sagar and its cleanliness. There are 100's of trains which are clean equally or more but still its a useful tip when u consider trains between these 2 places.
Similarly, your remarks holds good for the 1st AC.
I believe there are certain changes for 1st AC...
more... coaches of 90's made and 2000' made. Faux wood was absent and there was no linen on berths for 1st AC.
As I said, few need to park emotions aside while considering a point.