...well, the symptoms on the lower leaves is so advanced and mixed, I can't tell what's what exactly,... mostly N and P, which fits as they are mobile within the plant,... Yup, they were starved a bit, and there's no fixing the long term issues from that (stunting mainly),... yes, you can get a little burn, which comes from too much too fast, but I'm not so sure that is nute burn,...
Run-off alone is not a good measure of in-pot pH especially if you didn't know the pH going in,... it can paint a very general picture though, and likely, the soil isn't too far off if at all,.. What's you waters EC/ppm, and pH? Did you adjust the water before going in? This will also skew run-off results as well,...
If you run organic, you must get inoculants in there, or teas, etc.,... they are the key to breaking down the nutes into available forms,... I'd look into an enzyme product too,...