Could be wrong but I doubt McLain will be in Cincy until mid-season. Unless forced by injury. Not enough AAA exposure yet. Reds will want him to adjust as AAA pitchers get a book on him.
But I do think McLain has a good chance to be Reds next shortstop. He’s a solid defender as I understand. DeLaCruz is tall for a SS, we’ll see if his position moves.
On relievers, I’m sure Reds would like more young hard throwers but I don’t see the doors being knocked down. It’ll be gradual, as guys prove themselves. Replacements will work in one by one.