The decommissioning scheme is only aimed at the biggest, high catching under 10s. No doubt there are some skippers that believe they can't survive on the quotas they are allocated (50kg/month for cod in the english channel is fairly common) so they will take the opportunity to get out of the industry. currently extra quota can be leased which is allowing some boats to keep their heads above water -this is stopping next year, so those boats will become unviable.
The other interesting part is the restriction of 'low catching' vessels' licenses. This will effectively make them worthless to a full-time 'quota species' fisherman, and as such the value of them may drop. This, however, may make them more attractive to "RSA's" targetting bass, who can then buy a license relatively cheaply and start hammering the bass for profit.