Its a developing progress and double tatics have been changing over times.. The traditional believe is the magic of the T which is a decent neutral way to play, but nowadays we have faster, stronger player and speedier racket, each player simply can actually cover more area so they can play smarter and be more interactive then before. Nowadays when double goes into attackig postion (front back) the net player would generally be more tilled to the side on covering the Straight line expecting a weak return to intercept. So the base position is no longer solid at the T spot anymore, and the reason why they take a step back from the T is because the net player nowadays actually cover any weak half court clear return as well. if u watch some tournment videos lately u'll notice u don't see as many instand kill smash anymore, instead most of the time the back guy's smash is to create opportunity for the front guy to intercept and pick out weak shots to win the point, playing the net guy simply is becoming more fun and exciting then ever
back then as in 20+ yrs ago.. atleast thats what i was taught back when i was like 10yrs old i could have been feed with wrong tatic about the T but thats what i told
