Yeah after last year I felt pretty set at center. At this point I'd look around at some options with our late picks (I think that is a pretty fruitful area of the draft for bigs) and might even consider some FA options if there was a really good trade available for Walker.
I think the Collins sidequest has also hurt Walker. I'd say I'm at a 6 right now out of 10 on the worried scale.
I wouldn't prioritize looking for centers, but I'm definitively a lot less certain that Walker is the guy than I was before. I'm only at like a 3 on the worried scale, but that's because I had predicted a Sophomore slump, so some of this is just what I was expecting.