If that was wanted, then extending the Trent Valley service would be the way to do it - that would actually achieve something useful, wouldn't cause much of a timetabling issue (provided the path could be found), and would actually give VT a very heavy kicking in competition terms too (as many on here like).
That would have made sense, yeah. Really bad idea to change that route up and then throw on what's already a busy train linking two big cities and then extending it to London. It's not like it's an 9 or 11 car Pendolino either, it's the same clapped out rolling stock.