4 different databases when you could just postgres. Also seems that 'Think and Plan' and 'Reflect' phases are redundant, as stated: 'Think & Plan: Process Reflection'. Also more personal opinion is that LangGraph is unnecessary framework only slows you down by spiking up complexity.

Not sure how you manage to measure Faithfulness and Answer Relevancy on the live system, without the ground truth.

Good that you have evals in place, but the user satisfaction score might suggest running ablations on the system would be beneficial. I would start by reducing the iterations and unnecessary steps from the agent.