Should I start adding nutes?
What have you got for nutes? I'd try to use as little N as possible right now if you add anything. To me the plant doesn't look like it needs anything atm so adding more right now could increase the problem you do have which is fairly minor at this point. It seems to have enough of the base nutrients but you could see deficiencies in the micro-nutrient family before long that will start showing in the growing tips first as they are immobile and need to come from the roots. When the others which are mobile get low the older and mid-range leaves will show symptoms as the plant relocates what it needs to the newer growth that will remain healthy looking until the condition becomes chronic. You'll know things are going to shit by the yellowing and dying off of old fan leaves before that happens.
This is a good chart for figuring out what is going on. Lots of clues around the plants to help lead the eager sleuth to the root of the problem.