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MrGrumpy She wasn't offered a "smaller role", she was offered an entirely different government portfolio, which she viewed as being a demotion from what she had been doing since 2016 as Finance Minister. She didn't resign from being Finance Minister, she was re-assigned in her job description.
She could have resigned from cabinet which she did after refusing to accept her new portfolio offered by Trudeau, then held NO cabinet position whatsoever while still maintaining her role as Deputy Prime Minister indefinitely, but instead she chose to resign not only from Trudeau's cabinet, but from her position as Deputy Prime Minister as well.... two resignations from her in one day, which means she resigned from the Federal Government.
It definitely IS nothing because LaBlanc will take her place as Finance Minister and therefore, that position is filled by a very competent person, just as she was and nothing changes.
The position of Deputy PM is quite irrelevant and therefore totally unnecessary because it's an un-official government assignment and could go vacant for years if the PM decided to leave it vacant.