Last year the Red Rose were denied by a crushing defeat to Wales, who claimed the title in the process, but their only defeat this year was a narrow two-point loss to France in Paris courtesy of a late Gael Fickou try.
And while Lancaster has again failed to lead England to the title - they last claimed it in 2011 under Martin Johnson - he believes his side have evolved significantly from 12 months ago.
"There is a long way to go but this Six Nations has been a good step forward for us," said Lancaster.
"I'm never satisfied and always want to keep improving.
"I think 14 tries in the Six Nations is more than double what we scored last year. Also the intent with which we have tried to play and the shape and the framework we've played with.
"People can see quite clearly what we are trying to do and it is hard to defend against. We have made good progress in that regard."