Yes sir, that still holds true with just a slight difference. One, we have single decked coaches on some routes, like the one I had for my Cardinal. (Pic 1)
Also one coach is of one particular kind. Slepping coaches will only have sleeping accommodation and similarly with coach seats (CC Class)
Secondly, the doubled decked coaches have a limited amount of coach seats on the lower level as well (12 odd seats or so) (Check the windows in pic 2). If you aren't interested in the better view from the upper deck,...
more... picking the lower level gives you a lot more peace as people don't walk through the coach all the time. Also, as you mentioned, restrooms and luggage area is on the same level. So these are much more convenient seats for senior citizens.