Why are they adding more 3AC coaches and taking out some sleeper and general seating coaches from regular superfast and express trains if they are gonna slowly phase out 3AC coaches from the normal/mail express trains with Garib Rath coaches?

Garib Rath trains mein 3e coaches lag rahe hain aur IR ne normal m/exp se 3e coaches ko dheere-dheere hataane ka plan banaya hai, to fir hum normal s/f & exp trains mein 3e coaches ki bharai aur kuch sleeper aur GS coaches ki hataai kyun dekh rahe hain?

First time this train is running with LHB coaches from Bandra Terminus to Delhi Sarai Rohilla, what a capture!