In fairness to Kellie, she didn't have much of a choice once Massengill opted to leave. Other than Slocum, I don't know any elite PGs in the portal that weren't already scooped up. Walker wasn't ideal, but she was the best that was available.
It's not like Massengill left right before the season. She left in late March. From the moment she entered the portal, finding her replacement should have been priority #1 and 2 for Kellie and she had an entire offseason to do so. I wouldn't consider Massengill "elite" and her replacement didn't need to be either, just someone competent. Because of that failure, finding a veteran point guard will be a priority once again this offseason or we'll be in the same situation next year. Fans who think Miles will be ready to run the team her first year are going to be sorely disappointed...