It would suck. I suspect Kubo brought back the Shinigami favorites to move things along and bring up his ratings a little, but he didn't plan it very well. On a whim has been his default style for a while now.I mean, imagine if the first time you saw the crew post-time skip was when they were getting paired off with the NFP. Zoro gets to say two sentences, beats his opponent in a single page, then dissapears from the climax again.
Because we barely any information on the Fullbringers, the Shinigami rushing in to defeat them seems......extremely superfluous.