I don't think the match itself was a bad idea, to be honest. In a better situation yeah, you wait for the PPV, and in an ideal situation, you wait for Starrcade. However, as everybody has loved to point out since their death, WCW was not an ideal situation. The storylines were slowly but surely falling apart, Goldberg couldn't keep squashing guys forever, and WWF was right up on Nitro's ass. And after what happened to Sting, do you really think that fans would've trusted WCW with handling a Goldberg/Hogan main event? Hell, just the fact that Hogan would be defending the belt against Goldberg at Starrcade shows how badly they screwed with Sting.
When you really look at things, WCW's reasons for hotshotting that match were legit, and perfectly justifiable (well, except for the backstage crap, but whatever). Where WCW really went wrong, and why everybody laughs at their decision now, is that they didn't build it up, and there was no follow-up, the follow-up being the bigger of the two sins. Rushing Goldberg/Hogan is excusable, not promoting it until the last second is disgraceful. This should've been a date circled on their calendar a month earlier. Hogan should've had the date marked in his head and started his machinations much earlier. And after the deed was done, they shouldn't have acted like nothing had changed. Perhaps that was why Hogan did it, so he could pawn the belt on an acceptable new talent while still remaining at the top of the card due to the storylines being locked in. Still, their name was WCW, not Hogan's Wrestling Federation, and the fact that they couldn't even figure out a way to modify their own storylines to keep Hogan happy while Goldberg gets his just due as champion really showed off their incompetence, moreso than any amount of hotshotting could've done.
So yeah, the hotshotting in and of itself wasn't a bad idea. Hell, WWE does it all the time, but instead of calling them out on it, people take the "wait and see" stance. What really made this a comedy of errors was just how little time they gave themselves to promote it, and just how little effort they put into capitalizing on the incredible buzz that they'd created.