My new science fiction book includes a certain amount of planet-hopping. There’ll be some sneering and lip-curling over this. But don’t be in too much of a hurry to point a derisive finger.
Characterisation is at the heart of any really good story as far as I’m concerned. Real people dealing with real situations. Or sometimes (as in speculative fiction) not-real situations. That’s when creating believable characters becomes absolutely crucial. If your characters aren’t believable, your reader won’t relate to them.