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Overall health looks great, dont worry about a few leaves dying that is normal, slight under watering can cause old leaves to die. Yoe should be feeding cal mag at least once a week it will help the plant with nutrient absorption.

I would recommend no more nutrients until the fan leaves return to a uniform color.

Not if you just repotted, it will take a week or 2 to recover

Remove any damaged leaves

Yes if the new soil has nutrients you wont need to feed for at least a week

The ph could be high causing an iron deficiency which looks very similar.

Yes deficiencies are symptoms of a problem. But the way they pop up with ph problems is different then just a plant that needs more nutrients.

Yes this is a deficiency problem intervienal chlorosis is a dead giveaway. You could flush until runoff is 6 to 7 ph then feed full strength bloom a and b with cal mag.

Are they flowering have buds set yet

Yes I agree that you can have multiple deficiencies from ph problems but the deficiency isn't the problem it's the ph. A deficiency problem shows many symptoms before late stage potassium deficiency. The plant is pulling potassium from older unneeded leaves.

Are they in soil

How long have they been in the 10 gallon pots

Only in soil less mediums where there is no ph buffer and all the nutrient water must be ph balanced is where you will see multiple ph related deficiencies. Soil doesn't have large ph swings like hydro. So the most mobile nutrients will be choked out immediately when it passes a certain ph level.

It doesnt matter what the No you dont need to know any of that stuff to be able to tell the difference between a nutrient deficiency and a ph problem. Nutrient deficient plants have multiple things happening at once, slow or stunted growth, woodie purpling stems, smaller fan leaves, weak new...

In ten years I have been away from my plants 1 night. Yes i have nutrients dialed in it is much easier then you think?

Because it is a ph issue, nitrogen can be used by the plant at a wider ph range. So if the soil has dropped to say 4.5 ph it can still take in plenty of nitrogen but almost no potassium.

It would of had problems long ago if it was only fed nitrogen

I've used cal mag for ever and never had a burn

It will show signs of nitrogen deficiency long before anything else

It looks like a big plant in a ten gallon pot of soil. Probably been in the same pot since it was half the size it is now. Which means that it is drinking a lot of nutrient water that leaves behind toxic salts in the soil that will lower the ph over time.