We moved from structured decoding to tool calls and agents a long time ago. It was more useful when models were too weak to hold syntax reliably.
Incidentally the teams and people who think dspy is great are also generally the worse teams that can never make a lovable product so take from that what you want.
I said "techniques in DSPy", your agentic workflows are already using them. Read the GEPA paper. I'll put the link here and you can scroll down and read it.
https://github.com/stanfordnlp/dspy
Your agentic loops are already doing these things.
Now their main weakness is creativity, planning and decision making