no one can predict what will happens next week,let alone next year lol.immigration program caps,targets,implementations and new proposals under the economic class are all subject to labour market growth and/or decline,so if there is a huge demand for any of those occupations they might be eligible again.
but my own opinion is most likely you will not see those occupations back into CEC program anytime soon simply because before CIC makes changes they do consultations and studies with stakeholders,consultants,employers,lawyers,the public and other government bodies so they pretty much have a clear idea,as you can see they have enough applications under the concerned occupations in their inventory and they will continue to process them until a final decision is made.