Interesting comments.
As much as I like Blue Mitchell, I see the wisdom in your statements. His "repertoire" always appeared a bit limited and "workmanlike" would probably be the best way to describe him. Great sound; nice runs, but didn't offer much that was new.
He reminds me a lot of Tommy Turrentine, or perhaps Tommy Turrentine reminds me a lot of Blue Mitchell. They seemed to have been cut from a similar mold.