It's certainly possible, and my approach is not based on a crystal ball. Personally, I wouldn't move McCourty to CB (using him there on occasion is different - even with the 2014 CBs that happened) and spend a high pick on a FS, I'd rather spend the capital on guys who fit in my eventual target scheme, and jury-rig the best possible interim approach for 2015. Randall is a fine player, but he was looked at by the Pats before they re-signed McCourty; I think he's really a safety, and fits best in a Cover-2 or as a McCourty replacement if McCourty moves to CB. Neither of those is my personal long term direction, so I'd be hesitant to use a day 2 pick on such a target, good as he may be. He's certainly worth a day 2 pick, but I'm not sure he's worth it to us given other areas to target and available values. Holliman will be cheaper, but is much more scheme limited, and not as good, IMO.
Again, your plan is certainly reasonable, and it could well end up being what BB does. It's not my approach, which would be to target the best prospects available for getting back to press-man as the dominant scheme as soon as possible, but I certainly don't have a monopoly on blueprints. It will be interesting to see what direction BB eventually takes.