Slightly better, but McCain likely chooses Fred Thompson as his running mate, thus countering Gore's favorite son effect. Also, McCain was not seen as an out-of-touch intellectual.
Also I think Gore would have fallen off almost as hard in West Virginia as Bush IMO. McCain would have less evangelical support but just as much coal support as I think Gore’s green image was the biggest part of what cost him the state that year.
That's the narrative but I've read multiple articles from 2000 on why WV was competitive that year and when voters were interviewed they said they were voting for Bush for social/cultural reasons.