The problem the NHL will have is that, if Rogers drops NHL coverage, they would need someone to pick up the slack in a big way in Canada.
The CBC's announcement of layoffs shows that it's not in any position to take on the expectations that the NHL has in terms of broadcasting in Canada. This is especially true given the CBC's declining OTA reach, which allows some avoidance of the long-running issue of cable cutting.
BCE is notable that they had an opportunity to take the rights and said no. They have very good reasons to have taken that route. Having TSN carry the games isn't enough as they would need large portions of the CTV sked to meet the NHL demands. That takes up airtime that they could better use. Not to mention that the playoffs go through the sweeps period of TV programming, a period in which the NHL would demand more of those TV slots. There's a reason BCE hasn't been gun-ho about broadcasting the Olympics after the 2010-12 period.