I'm hoping for less Walker. The dot guy is responsible for telling the other players where to line up, and when the play clock ticks down to the last 15 seconds, he's not getting any information at all from the booth - so he's on his own, and has to make his own decisions on positioning. And from what I saw last year, I don't think he's very good at making those calls on his own.
Remember that 4th down conversion in the Carolina game, when Bryce Young kept the ball on 4th and 1 and just plowed through a wide-open A gap that was completely uncovered? That was on Quay. Nixon saw that play coming, and moved into position to defend that gap, and Quay yelled at him and waved him back off the line of scrimmage. Nixon pointed at the hole, and made a "WTF?" gesture with his hands, but Walker shook his head and moved him back about 6 yards off the line. You could see Nixon wasn't happy, but he did as he was told, and sure enough that was exactly where Young went.
Nixon made an incredible play to try to close that hole the instant the ball was snapped - he hit Young head-on just as Young crossed the line - but he was a split-second too late. He covered those 6 yards in the same time that Bryce covered a yard and a half, and threw himself headfirst at Young, but it was just too far.
That conversion was entirely on Walker, and I can't think of a single sensible reason he would have thought that was the right call. I can't even imagine what was going through his head.
Then I looked up his Wonderlic score - it was 9. I'm just not sure a guy with a Wonderlic of 9 is the right choice to be making those key strategic decisions on the field.