we're talking about OTA's and camp here. Why SHOULDNT a rookie be given 6-8 weeks? A vet can come in with little camp and play just fine. So, since we have time, by all means yes, lets see what the rookie can do.
Depends. If Dallas picks up a veteran who has not played MLB in this 4-3, then even that player needs some time to acclimate himself to the scheme and his teammates. If Dallas decides to pick up someone like Urlacher, then he needs time to shake the rust off. Plus, you do run the risk if there's a particular player that you want of some other team having a need and going after that player as well. (I don't think that will be the case with Urlacher, though.)
I'm not a fan of waiting until late in camp to bring in a player, like we did with Brian Waters last year. There needs to be time for them to get their body and mind ready to play, especially if they are going to end up starting.
If the rookie proves to be better then the rookie should start, but I'd rather him have to compete for it then essentially be given the role by default.