Being the devil's advocate...
Gavin Williams and Sam Hentges pitching no innings this year isn't sustainable.
Jose hitting .263/.655 isn't sustainable.
Bo hitting .185, Laureano .178, Brennan .222, and Freeman .217 isn't sustainable.
The Guardians having an on-base percentage of .284 with no runners on isn't sustainable (it was .307 last year).
How do you know they're on a hot streak? They've only played 7 of 22 games against teams over .500. Maybe they're an above average team beating bad teams.
I understand what you are saying, and some of it is IMO sound reasoning, but...
Williams and Hentges are likely to be back soon, but how far into the season do you really think TMac and Cookie will last? How many innings do you expect a starter to last with an elbow problem? We have two.
Brennans wRC+ is 87. His career number is 88. I expect him to be better, but its hardly like his present lack of production is unsustainable. Even more so with Freeman. His present wRC+ is 105, well above his career 87. While I'm high on both..esp Freeman...its not like they are underperformed what they've shown so far.
I think we are an above average team, but that comes with several major caveats, including having an upper level rotation that remains healthy and an elite pen over the course of 162 games...both of which I think are...uh...questionable.
We talk mostly about our offense. Is it really improved? Are the results, individually and as a team, sustainable?
None of it matters if the pitching blows out.
Just a historical footnote...
We haven't had a successful season without either a healthy Kluber or Bieber fronting the rotation since 2013. One of them was a leading CY candidate in every successful season weve had since then. What do you think the odds are that either Bibee or Williams are gonna be a leading CY candidate this year?
Can it happen? Yes.
Is it likely? Hmmmm