Pantera line is broken through earlier.
As a result of winter fightings 1943\44 German North group of Armies had to leave RSFSR territory and to create "Pantera" defence line. But maybe Soviet troops could do more-at this time soviet mobile wasnt big enough and couldnt disturb Nazis as bigger gorups of this type in 1944\45. WI Soviet created this troops earlier? in this case Leningrad front could liberate narva in january 1944-after Gatchina was liberating german troops were desorgnisated-so Soviet tanks could move to the south, circling German troops-and the would have to go away to the line of the Daugava river.
It isnt important-when to die, but its important-how to die.