It is not even the cost.
What exactly would Hurns do?
This is just my opinion, but it looks to me like they want to add versatility to the mix, and guys that can not only play outside but in the slot as well. If you run Hurns, Gallup, and Cooper out there, you have two of the three that can line up in the slot. When Beasley was on the field, you knew where he would line up and therefore it made things easier to defend. Guys like Hurns, Cobb, and Austin bring versatility and more flexibility to an offense in my opinion.
Just once, I'd love to see Austin come in as the single back, and then motion out to receiver and just fly down the field as fast as he can. I don't even care if he catches the ball or not, just to scare the crap out of a defense and show them something other than the "same old, same old" we've been running for years.