The article mentioned that the delays were the result of lack of proper testing. So she's probably making sure they test GNR right and don't repeat the SPR mistakes.
Lack of proper testing? They laid off the pre-silicon validation team, crammed in an insane amount of scope for one gen (DDR5, PCIe 5.0, CXL, Golden Cove, AMX, chiplets, accelerators, and god knows else that didn't even make it to market), and are still acting surprised it's a dumpster fire? No, any
other result would have been shocking, but not this one. "Lack of proper testing" is PR speak, because they don't dare admit how bad the reality was/is.
And Rivera's team doesn't do the validation either. The questions anyone should be asking of her is, did her org give the engineering team the time, money, staffing, and scope needed to have a predictable execution schedule? The fact that they're doing layoffs even now certainly doesn't inspire hope. Nor the fact that they're using their 2023 core in a 2024 product. Either way, Rivera switched roles too late to decide those big questions for GNR, so it'll take till DMR earliest to see her mark.