Agreed. Audiences can learn to care about new characters as they have previous characters and crews. As long as plotlines and conflicts are introduced properly and not forced, fans will accept a new crew.
Maybe. But this long-time fan is done with the spinoiffs of spinoffs of spinoffs. From here on out, I'm only interested in Kirk, Spock, and the Enterprise, the Star Trek source material. Just as I wouldn't be interested in a Sherlock Holmes series about any character other than Sherlock Holmes, or a Superman series not about Superman but some other superhero no one's ever heard of before.