My suggestion would be to accept.. Utilise 80 days and submit after that as now 90 days are given to submit docs.
..it should be fine as I personally knows people who received ITA like you and submitted after completing 365 days and now they are PRs.. Regarding predictions.. They all are predictions and no one can say if it will turn to reality.
I got ITA in 2019 oct. My crs was 468..and that time it was more than enough as in every draw till 2019, I would have got an ITA with that score.. So with that in mind due to personal issues I had to decline ITA and I declined on 60th day.. Once i sorted my issues. I reenterd pool. But after that it never touched 468.. So me and my spouse had to write IELTS again and increase score to 472 to get an invite.. Reason I explained the above is.. No one can predict for sure score and draw type