According to the above leaked image, it seems that Capcom will punish players who rage quit in the middle of a match with an Icon following their profile. This is to let other players know that this person has rage quit before.  As well as additional penalties
““Penalties will be incurred for disconnecting during a match, including LP (League Points) reduction, and temporary matchmaking restrictions.””
However, there doesn’t seem to be an indicator to differentiate between rage quitting and disconnection by involuntary causes such as power, errors, connection, etc. Until that is implemented, is is my opinion that this system will likely cause frustration.