I waited until I was eligible to apply, and I became eligible literally a week after they stopped CEC draws last year. If I did that, so should you.
The system doesn't give you points prematurely per se, it simply awards points for a 12-month period. However, the onus is on you to apply when you full well know when you're eligible and that means 52 weeks, 30 hours each week.
Think about it this way, if they accept and later refuse your application after reviewing it in 3, 4 or 5 months, you'll be starting all over again and your PR will take even longer.
They do give you points prematurely: if you complete 2 years of experience on the 15th, you will still get points on the 1st, because it only counts the month, not the day.
So you might receive ITA.
The question was specifically about people who are already eligible (already have 1 year of experience) but may get points for 2 and 3 year experience prematurely.
We are in the same situation as you: my wife completed a year of experience just as they stopped draws last year. This year, she will receive points for 2 year experience a few weeks before she completes 2 years. So her basic eligibility will not be affected, but the points will.
And "I waied so you have to do it, too" is not much of an argument. What if it was incorrect to wait? (Not necessarily in this situation; in general). We indeed waited, but maybe we were fools/incorrect there. I heard people say it's ok to accept ITA, as long as you don't apply until you actually generate all the points you were awarded by the system. We decided not to risk it, but then I kept seeing all the people saying that it's fine to accept ITA, as long as you do have the number of points needed for the draw by the time you send documents.