The F1 supremo was speaking at Interlagos, where next weekend Brazilians will flock to the penultimate round of the season despite already knowing the outcome of the title battle.
Ecclestone agreed that 2015 has been too one-sided.
“We are changing some things to get people more interested again,” he is quoted by UOL, when asked about the current health and spectacle of F1.
“I think we need to give a better show than we are at the moment. I remember McLaren on their own (in the 80s) but at least they had two drivers fighting each other.
“In a way, (Lewis) Hamilton is so much in the public’s focus that no one cares about anyone else. I think it will improve in 2017 for sure,” Ecclestone said.
As for the fact that the title was decided with three full rounds remaining, he added: “We’ve seen it before with Schumacher or Vettel. But never like this.
“I don’t care that it finishes early because their (Mercedes’) car is better than the others, but I think Nico (Rosberg) could have done a better job this year.
“We saw in Mexico that he won the race easily, so he will come here trying to repeat it for sure, but a bit late,” he added.