Though taking guards in the draft has become more fashionable, it usually a better bet to take a college tackle. Unlike most observers, I like this pool of offensive linemen and I think good value exists deep into the draft.
I don't think Clement makes it to the start of the season. Don't be shocked if Davis ends up there. I wouldn't be surprised to see Kendall back at guard. I still think even with good coaching, this line needs a lot of work.
I think Green would like a more explosive back, but he has bigger needs and I think he will stay with the group he has unless he becomes convinced Smith is out of gas.
Beyond Boldin, nothing is certain at receiver. Johnson will get a good shot a earning a job, but has little margin for error. Green will expect marked improvement in Johnson's game. I'll be curious to see what Green does with Poole. Poole doesn't fit Green's prototype, but Green will be making a huge mistake if he doesn't see what this guy has to offer. If they're going with McCown, the Cards would do well to keep Poole in there. He and McCown work well together and McCown will need all the confidence builders he can muster.
I think you are right that Hodgins better show up ready to play and the Jones should as well. I think when Green reviews the tapes; he'll find Jones' statistics are better than his play. However, he likely survives as there are bigger holes to fill.
As to quarterback, I think Green will bring in a vet and give McCown a very short leash. McCown will get a chance to control his own fate, but if he throws away a couple of games, Green will turn to the veteran.