They look a little pale, could need some nitrogen. The spots are hard to tell from the picture but look like a magnesium deficiency. What kind of water do you use, what is the ppm? I would try using cal-mag. There is also a little purple in the leaf stems, could be a lack of phosphorus. What flower nutes, and what soil are you using? Sometimes Foxfarms Ocean Forest runs hot and can cause some issues. I would also suggest flushing the plant out and testing the ph on the water that runs out. Starting with a soil ph of 5 is very low and could be a culprit, often leading to nutrient lockout ( should be about 6.5-7). Do you test the ph of the water that you use? What are the temps and humidity day and night?

Yellowing is common during the last weeks of flowering, the plants have used up there stored nitrogen and it shows usually on the lower leaves. This is not a problem and things continue to yellow during the last 2 weeks of flushing. It does not look like it, but spots can also appear from misting or spraying while the lights are on.

Overall they look fine. They made it to the flower stage and should make it through to the end. I would start with a flush and test the ph and ppm of water that comes out. This will give you a jumping off point in tackling the problem.

Best of luck, please let us know what happens.