Credit for the decision to put Keller back in charge of AMD's CPU core design goes to AMD CTO Mark Papermaster.
I would give the launch of products based on Zen as much credit for AMD's turnaround and present success as I would give Doctor Su.
Dr Su made some decisive calls to stop projects and placed a prescient long term bet on high-performance computing.
She shut down low-power tablet asic designs, shut down the SeaMicro acquisition, shutdown Keller's K12 ARM chip, shutdown a large monolithic CPU/GPU asic with shared memory and planned a shift from Global Foundries to TSMC.
Deep Learning was not on the radar unfortunately. It fell under Raja Koduri's group and he made an unfortunate bet on Virtual Reality (way before Zuckerburg started his metaverse fantasy).
It the end it helped that Intel stumbled badly allowing AMD to recover financially.