Deskilling and redundancy are related but completely different. Both are reasons to resistance to change, but one is a reason for employees and redundancy is a reason for employers.
Deskilling is a reason for resistance as employees fear that the skills they have will not be needed once the business has undergone change.
Redundancy is a reason for resistance for employers due to the financial cost involved. Don't forget that under WorkChoices some redundancy payments are no longer necessary.
That's my understanding anyway, please someone correct me if i'm wrong.