No such thing as overwatering, nutrients can only uptake where water is present, the medium must be well saturated frequently to around 5-10% runoff, only a badly composed medium that retains too much moisture alongside an environment that's too moist and damp to promote optimal transpiration.
Vapor pressure deficit (VPD) is a measure of the difference between the amount of water vapor in the air and the amount of water vapor the air can hold at its current temperature. VPD affects both air and soil, causing drying and water stress.
We need to make it slightly drier 40-50%rh, higher temps, right now your on 70F too cold for photosynthesis 80F ambient, very little evapotranspiration to occur from medium to air at 70.
Water can only uptake or evaporate, if not it stagnates, water is a solvent used for cooling and nutrient transport if its not cycling through the plant well nothing works well including growth, eventually ph always drifts if your unwittingly feeding more than she is consuming, when you feed 100% but transpiration cannot function efficiently she will be limited to only eat what she can use, leading to salt buildup and eventual ph drift.