I don't see how swapping Higuain for Morata, as long as it's a loan agreement till the end of the season, is a bad idea for Chelsea.
Even if Higuain fails here, what do we have to lose? By now we know for a fact that Morata is a hopeless case, at least with Higuain we can try someone else and that's someone Sarri knows and worked with. If nothing good comes of it, he'll be gone at the end of the season anyway, so it's a win/win for me, given how terrible Morata has been.
I know Pipita's been struggling lately but given how difficult it is to sign players midseason, this is probably our best bet at potentially improving our situation upfront, even as a short term gap. I know people bitch and moan about the board and I do my share of it too, but sometimes things just don't work out the way we want. We don't want to sign older past-it players but buying young talent isn't a sure thing either (Morata, Batshuayi). There are no guarantees in this business, but at this point it almost seems, if Higuain comes in place of Morata and scores big fat zero all the way through May, we'd probably be in the exactly same position if we didn't do anything at all, so where's the downside.