It would be hepful to see a picture of you on the bike.
KOPS is only a starting-point, but if your patella is 8cm behind the pedal and you are struggling with the reach, it's difficult to avoid the conclusion that bars and saddle are too far apart and that the main problem is the saddle position. So yes, I'd look at a zero setback seatpost and getting the saddle forward 50 or 60 mm and seeing how that feels. Remember that as you move the saddle forward you will also need to raise it, otherwise the distance from saddle to pedals will decrease.