Is this just natural harvest deficiencies?

Phosphorus deficiency. Darker green leaves, purpling of stems, turning glossy or shiny. Usually when buds forming and getting bigger and Phosphorus gets pulled from the fan leaves. If not fixed, next step you will see will be pretty soon and those tiny brown spots are gonna take over quickly and turn leaves brown and crispy. Id add more florabloom to your feeding schedule. Or if you are already at a high dose. Spread the nutrients over into the next feeding that you normally do just water. Also, you do seem to have a bit of nitrogen toxicity. The claw doesnt stay that bad for weeks once the issue is fixed. Id dial your added Cal/Mag back a bit, as your FloraMicro has calcium, magnesium, and nitrogen already. Looks good though. Easily fixed.