One good game doesn't make Cleveland tough.
They have no stability.
The owner doesn't make good decisions regarding football management.

Having several good players doesn't necessarily make for a good team.

Next year, they will AGAIN have a new coach, and as a result new systems.

Cleveland is not ready for prime time nor will they challenge the division. Not sure they'll be much better next year than this year.
Might they get a couple more wins this year? Sure.

But they'll be like the Jets. One good game, two bad ones.