Paxton, at 20.1 IP in 2020, still placed 6th in starter IP in 2020, so don't pretend he didn't pitch. He was also a big part of the 2019 rotation, and I was comparing 2021 to 2020 and 2019.
Here's the real deal: "far more upside" only counts for Yankee pitchers, to you.
James Paxton already has had a 140 ERA+ season. How much "upside did and does he have?"
Happ had a 125 ERA+ from 2016-2018 and had over 160 IP in 2018 and 2019. How much "Upside?"
Tanaka was a huge part of your rotation. Yes, he was replaced by some big upside players, but none have done squat for 1-2 years.
Why are ERod, Sale, Richards and Eovaldi all written off? I never hear you say the word "upside" with any of those 4 Sox pitchers.
The fact is, on paper, the Yanks did not improve from 2020 or 2019. The Jays did. Every year, the Yanks face a lot of injuries, but you don't seem to chalk it up to being injury prone, like you do to Eovaldi & Richards.
That being said, I do see the Yanks getting better due to players returning from injury and expecting you get something good from Kluber, Taillon and Severino, but in no way have you clearly gotten way better than the Jays, who added Springer and Semien and pen help.
"Upside potential" is not something only Yankees have. How much upside is there for these Jays?
Vlad turns 22, this year. The sky seems like the limit for this kid. (24 HRs and 102 RBI in his first 685 ABs)
Bichette turns 23, this year. He already has an .896 OPS and a projected 35 HR per 162 game number.
Gurriel turns 25, this year. He's hit .874 the last 2 years (31 Hrs in 600 ABs).
Teoscar Hernandez turns 24, soon. He hiy .919 last year and has 42 HRs in his last 671 ABs.
Rowdy Tellez turns 26, soon. He has a career .797 OPs (33 Hrs in 553 ABs)
Cavan Biggio turns 26, soon. He has a .798 career OPS (24 Hrs in 574 ABs)
Others:
Grichuk (29): .770 since 2018 (34 HRs per 162 games)
© Jansen (26): .668 career OPS (22 HRs in 548 ABs)
Nobody is over 27. NOBODY HAS EVEN REACHED PEAK PRIME!
Most are on the upside of their age-prime curve. Not many injury issues, either.
MASSIVE Upside potential for 6-7 players above. Some may slump, but others could move off the charts to the good.
Their rotation is the big question mark, and even if Kluber, Severino & Taillon give the Yanks very little, the Yankee ratation might still do better than a 100% healthy Jays rotation.