Next Year targets will be available in March and next year implementation plans start from April. The targets will be relatively same however more streams will be included and newly added streams will be improved. In addition, more money is planned to be spent on Technology and making processes smoother and faster. More applications will be received through EE but total economic immigrants will not be changed much.
Now coming to the current situation. I have already presented current data much time in this forum which clearly shows that they are well above their targets and therefore the size of ITA's are expected to stay below 3,000.
In regards to rejections, it is the responsibility of Candidates to meet the IRCC requirements. I have also summarised most common reasons for rejections for applicants to read before applying. 99% of applicants who are rejected have made a mistake that is part of this report.
http://www.canadavisa.com/canada-immigration-discussion-board/threads/post-e-apr-process-and-common-reasons-for-rejection.510587/
The main target for IRCC at the moment is to complete backlogs before April when the 2018-19 plan is implemented and process applications faster. As the Nomination Quota is ending soon it may help score getting down between November-January, however, competition is expected to stay between candidates above 420.
I hope this will help.