McVay's love of bigger weapons may be derived in part from Stafford preferring them. Prior to Stafford, McVay did well with some smaller wideouts in his offense. Cooks was very productive, Woods as well, in important roles in spite of the fact neither were physical after the catch like Kupp and Puka have been.
Also he has gone back to smaller wideouts on his depth chart in spite of the fact none of them offer a damn thing for special teams. Instead of having a guy like Skow who could come in and lead block a little for you, maybe make an occasional catch, and provide strong teams production.
Lastly that last Colts game Downs played like dog shit. He is better than anyone we have after Puka on this depth chart, there is no doubt of that. But I don't know that he's the right guy on the mental side. I think he's a third WR which is why I've been leery of paying for him with additional cost in picks at the deadline. Not physical at all. And not a gamer like Kupp or Nacua or even Woods who had the mentality he wanted in spite of his smaller frame. McVay requires dogs. The type of dudes who are undaunted and can produce snap to snap. The guys who disappear don't work in this offense.