A realist applicant with a sub 400 score wouldn't expect an ITA anytime soon. Personally, I think a little dose of realism isn't misplaced when it helps you to embrace the need to improve on your skill, which invariably improves your score.
Here are the reasons why the usual crs glass-floor ceiling may not crash in the nearest future
1. Cic has got lots of backlogs; and increasing both the frequency as well as the number of ITAs per draw wouldn't help the quest of clearing those pending applications. They would rather maintain status quo for as long as those backlogs are still there.
2. Far to many applicants are still stuck between the 400-449 range. Bear in mind that none of these folks has been invited all year long (except for the very few who got pnps and canny few who improved their score). Year end report would shed more light on the actual number we have within this range, however, my guts tells me-- it's a lot.
3. Lower in standard, technically. Ideally, it's not a set in stone that an applicant with a higher crs score translates to an excellent immigrant. However, a lower crs cutoff point may imply that applicants with a sub 7 IELTS score or a sub 9 CLB would stroll into Canada. Unfortunately, all across English speaking migration destination of most applicants (Australia, UK, etc), applicants with a sub-7 IELTS would struggle and hustle for PR.
The reasons enumerated above are far from being exhaustive, but I believe would suffice to help applicants in the sub 400 range come to a decision. Explore the few provincial sponsorships available or improve your crs score. You may also want to explore Australian residency visa, it could be easier, faster but more expensive. It could be ideal for pure FSW category with over 8 years of experience, under 39 and a 7 IELTS band.
Caveat: the above "gibberish" represent my opinion and should not be construed as statement of fact.