When you pick an OLman that high, he is ready to be plugged in and start from day one....unfortunately, that has not been the case. Smith has been plugged in out of necessity rather than talent at this point. He may become a great OT, but the pick was too high. We'll see in 2 years if he was worth it.
But because of Romo's age/contract we needed for him to be a star and a fixture at LT RIGHT NOW.
Watt on the other hand, is already becoming a superstar and difference maker on D.