Not worried about Bo Naylor. He will be training on the job as an MLB catcher, and that's where he needs to be. He doesn't need to be a superstar, just a good, solid MLB catcher that can at least hit his own weight.
McKenzie is problematic. If he misses most of the season than I don't know that the division can be won. They really do need him. It's pretty obvious Bieber cannot be traded now. He is vital. Gavin Williams needs to come through as advertised and Bibee and Allen need to give consistent starts. The pen needs some normal rest, so the starters have to give innings.
A bat, or two, is needed. It would be nice if Valera or Gonzalez can come up and become one of them and then a trade can be made for the other bat...a proven MLB bat.
Not worried about Ramirez, J Naylor, Gimenez, Kwan or even Bell. Rosario has never been a favorite of mine, but he is serviceable. If Straw could just bat .260 to .270 there is room for him, but a big OF stick must be added to him and Kwan. The bench is strong.
Fortunately the division is terrible and I believe in Tito, so the Guardians can do it. Just one game out now. Just one Reds-like winning streak would possibly put the division away...but the same can be said for everyone else but KC...so hopefully it's the G's that go on the streak.