I doubt both legs of the PO semi's will have fans. First legs would likely be 13/14 with second legs 16/17 - would it be fair for fans only on last match?
Don't see how this could happen with the EFL even if they wanted to. It would not be a matter of moving a single round of games from midweek to midweek. 17th May ( which contrary to report is not a 'fixed' date) is actually 9 days after...
I would assume that if a decision is to be made in April then the intervening period will need to be filled with a lot of planning...and an agreement that we would be willing.