Just to give you some insight on Kaberle last year, I know the family personally.
Frank had knee surgery last summer and came back to the states with stitches and bandages.
The early part of the season he had to get his BMI way down due to not being able to work out because of the surgery. There is only so much energy you can get eating salad. Also, his wife had a baby in October the morning after their long away games stretch and he has a 3year old too. Also, IMO excessive short shifting is no good for any player and the flu was havoc on everyone.
Frank is a great guy, hard hitting has never been his style of hockey, so don't expect that to change now.