Interim coach Clayton McMillan said it was felt Cane needed some support in the role, especially given he also had the All Blacks captaincy.
"It can be arduous at times. You have got to pick up a lot of responsibility, not just on the field but also off the field. Sharing that responsibility hopefully is not only good for the team but both of them as well, " he said.
Halfback Weber didn't think a lot would change because he had been leading behind Cane for the last few years.
"We've bounced ideas off each other, leadership-wise the last few years anyway," he said.
The joint captain role did have the potential to cause communication problems with referees.
Flanker Cane said in the past there had been referees who preferred to deal with one player only.
"Webey's in a pretty good spot at halfback as he can always chat to a referee in downtime, or scrum time," he said.
Also with their combined experience referees tended to respect that more.
"They know when they speak to us we are not going to be speaking with too much emotion and hot-headed. We've never gone to referees with things in the past unless we feel they are something that is directly affecting our ability to play the game or a serious issue. So it's not like we're whingers out on the field too much," he said.
Cane said he had discussed the captaincy with McMillan and said he wanted to continue in the role as it helped his leadership style grow and to get used to the responsibilities of being a captain full-time so he could take the duties a step-up as required at Test level.
"I feel it's better to stay sharp, keep learning and practising for stuff," he said.
Weber said as one who was already voluble there wouldn't be too much difference in talking with players. There would be extra media duties and outside duties that came with the role.
They were each comfortable with the introduction of the captain's challenge. Cane said he didn't see it being used every game, and it was more likely to surface in the last five minutes.
"It's trying to get rid of the howlers. It's not trying to question every decision, especially only having one. You don't want to waste it on something pretty average and miss out on an opportunity later. You see that in league," Weber said.
Cane said he felt the goal-line dropout could speed up the game and create some potentially attacking opportunities for the back three, especially against tired defences.
"The area of the game that it might affect slightly is the ability to have dominance at scrum time and use that as a weapon to build pressure, to put the referee under pressure.
"It's experimental with the idea that we want our game to be good viewing and make changes that are positive for it," he said.