In short torpedo still lacks parameters that Navy wanted ...hopefully DRDO can make it world class.
Human desire and expectations has no limit. 40 knots, 50 knots, 60 knots ...... it will keep on increasing, so will the need for range, larger warhead, more powerful explosive, better sensors etc...
Its never ending. But if you look at the picture I have provided earlier, you will notice that this torpedo is indeed "world class" , better than most.