A Rule 5 pick who has not played above A level and is not ready to contribute at the ML level would just be stashed on the bench for a year with no playing time; he would only take batting and fielding practice.
Last year the Indians had some guys (I think Valera was one) who went to the alternate site, took batting and fielding practice, and played some intrasquad games for half a season.
Looks similar to me, not identical but similar.
Actually, I think the rule is the selectee has to be on the major league roster the entire season. I don't think he physically has to travel with the team. The Indians could pick a guy and have him spend the entire season in Goodyear working out with the ALC squad and getting individual instruction. They would be short one player on their major league team, but if they are sure the Rule 5 selection will have a Michael Brantley career starting in three years it might just be worth it.