Changes made to set up have made certain strains take longer to finish

I recently made some changes to my setup. This is the end of my first run with it and its been a good run and with a few tweaks the next time will be better. Anyway i have an old strain and two new ones left going at this point in this grow. A Skywalker kush which is the old strain and the a strawberry banana and girl guide. My problem is that there are all breeder Estimates of 56/65days. Today is day 76 and as the skywalker-kush has been pretty dependable but the usual darkening of the pistils has only happened slightly. The Trichomes on all three are fairly similar in that they are showing by estimate less than 5%. The plants have been getting just phd water and are looking rough. Should I just chop or wait longer?

Looks like it got too hot. Stress can extend flower. gets too hot, gets too dry, big stressed like that an some others can do that a bit. Sometimes it never gets better, just continues to larf out. Sometimes it does fine.

I'd shorten the hours down to 10 on 14 off an dim your lights by 50%. See if it looks any better in 4 days an if not chop. If it looks significantly progressed then maybe let it go a few more days or whatever you think is best.

Cheers. I appreciate your advice