RENTON, Wash. — It’s probably far-fetched to think that the next Seahawks coach will replicate the success Pete Carroll had here. It might even be fanciful to think that any of the next five (10?) Seahawks coaches can do it, either. Nobody in franchise history was able to match the regular-season or postseason win count he had, and his 14 years in Seattle may just land him in the Hall of Fame. All of that is true. And all of that should be appreciated by fans of this football team. But none of that means that the Seahawks brass should have stuck with Carroll for a 15th year. The time had come …