If you want my opinion fan leaf yellowing is hit and miss. We have droped the nutes to encourage this but I have found happy well fed plant will yellow less than others also to leave options to harvest earlier if need be I wouldnt normally reduce nutes to week 9.
Resin is the best indicator and yours say chop now but with the lack of swell on those flowers if you cut early it will be at the expense of weight big time
10-12 weeks is typical on auto hybrids and yes smell will get worse/better as the days go by thats why eagar noobs cut earlier than they should