Usually at 50d of bloom i will witness bud hardeni...

The slow growth and ripening is defenitly because of the High Humidity and way too high day and night temperatures. In nature days are fresher towards the end of flowering and so should an indoor grow be too. U did defolation and that's a good thing because with this humidity bud rot is on the corner. Make the air flow very well and try to get it down to about 50% humidity. Let the girls dry out for a few days. The brown spots I cannot say what it is. Ph on point so the nutrients intake shouldn't be a problem. Dry them out and do a flush and try to correct the humidity and temperature. Plant still looks very good and maybe u should let her grow some longer to fully outgrow those nice buds. Still many white pistils so far from done in my opinion. Hope u get some answers from other growers too since I'm far from being an expert. Keep growing 😉