Uncle Fester, plopters can do the job to an extent less than current C2 capability. Perhaps that's what you mean by not having a 1:1. To meet (and surpass) COD capability, other assets are required (such as inflight refueling, ability to accept sling loads on the ship without too much interruption in cyclic ops, etc).
That is what I mean. A V-22 COD would mean losing some capability and changing others. It's not a great solution. But it's the best deal you're going to get, friendo.
"Just build more C-2s" ain't gonna happen. SAMC isn't at capacity, but you can't just build C-2s and E-2Ds interchangeably on the same line. You'd have to build a second line (the Original Recipe and C-2(R) were built at Calverton, never at St Aug). So you pretty much lose any cost savings.
Clean-sheet New COD...anyone think that if they went that route, it'd ever actually enter Fleet service? At least in the lifetime of anyone now serving?
FrankenCOD just punts the problem again. Actually not even...it gives the illusion of a temporary fix. Re-winging may be the 'must fix,' but its far from the only problem.