[AtlUmpSteve]

So your position is that coaches can make multiple defensive changes at the same time, but not multiple offensive changes at the same time? How do you come to that conclusion?

If a coach makes 2 or more changes at the same time, you accept all the changes; and they are official once you accept and report them to the opposing team. The prohibition against projecting changes is against changes that cannot be made at that time; multiple changes can be made at any time, just not one that will happen in the future. The changes you are describing are effective now, not future projections, no matter when the batter actually comes up.

What do you do if the coach changes his mind? You say, "Coach, you have made that change, and it is official. It cannot be undone. Are you asking to reenter the starter now?"