Whose opinion do you care about? It doesn't matter one bit what I think but what customers think, what employees think, what investors think are all crucial -- more important is how it plays out for the business.

I think a VC cares if you are going to hit it big or not, more than anything else. You can draw a tree where you: pivot or split and then various outcomes happen. Is the old business likely to be viable on its own? Do you have the resources to run two different businesses? What happens to customers dependent on the old business if you pivot?