low load: low suction, low superheat, normal head ?
and on the condense no condense argument, I'm still waiting to hear if this was the biblical flood. Sounds like the result wasn't stable, was the TEV searching? At least during the time the suction was down at 30 psi with a temp of 16 there was superheat. So that shouldn't have been a flood, just icing back because of low refrigerant return temps. I'm waiting for HVAC689 to describe the fluctuating pressure characteristics and any range of temps observed.
maybe there really is no such thing and changing water through two phases on the suction tube really always means boiling refrigerant, ergo no superheat almost by definition, but at least according to the initial report it was cold refrigerant temp, not lack of superheat.
I'm thinking that blocked distributor tubes would duplicate a multiple symptom problem, both low load and meter restriction, because if the design is for 4 pipes through the evap, having only 1 of those open has to cause an additional pressure drop. Even if the TEV were all the way open it probably couldn't overcome that 'design change'.