No, I get it... the guys who are fast AND quick are unicorn types who will get open quick and then outrun the defense... but they will struggle in end-line and side-line work because of their shorter stature. Sometimes raw size and a huge catch radius are needed, especially in tight areas... Then you look for guys like Gesicki or Williams.
This isn't a bad thing, it's just a bit of a limiting factor, just as you'll take out an undersized RB like Gaskin inside the five and insert a guy like Brown.
I think Waddle should be very, very good... and am hoping for great, but there are areas of the field that he's made for (space), and areas where he will be the third or fourth option... and that's ok.