Not as much as a striker, in my opinion.
If Pochetinno doesn't unburden Kane's load, then they will finish below Southampton, Swansea et al. They have nothing in midfield, granted, but they are still dangerous in wide areas - Townsend, Chadli, Eriksen's dead ball delivery etc. - and they can't hope to finish in the top five if they only have Kane, who showed glimpses of promise at Old Trafford this weekend but will certainly not reach the dizzy heights of last campaign.