Lets try this:
Buffalo - Josh Allen
Bengals - Joe Burrow
Chiefs - Patrick Mahomes
Eagles - Jalen Hurts.
I think if you were to go down that list which of those teams would swap Mac in as their QB? I guess I go back to the older view of the elite WR as the hood ornament or the last final piece you add to your team to push it over the top. It is what BB did when we got Moss. I think you also assume Mac is going to show tremendous growth, when he came in as a high floor lower ceiling guy. BB built his teams in recent years even when Brady was here around defense, tough running etc. It was the model for our last super bowl.
Pat Mahomes is a unicorn, he's got a great head coach, and one of the best tight ends in NFL history. And he's a unicorn.
The other guys:
Josh Allen through 2 seasons: 15-12, 30td's, 21 ints, 5163 yards, QBR of 67.9 and 85.3, and like a billion fumbles.
Josh Allen in year 3, when Diggs came to town: 13-3, 4,500 yards, 37td's, 10ints, 107.2 rating. Diggs had 127 catches, 1,535 yards and 8tds. Cole Beasley had 82 catches, after not catching more than 68 in his previous 4 years (he had 82 again the next season). Allen had 8 of the team's 16 rushing touchdowns in that season.
Joe Burrow as a rookie went 2-7-1 as a starter, threw for 2,688 yards, 13tds, 5ints, and had a rating of 89.8.
In year 2, they went and got him a guy named Ja'Marr Chase, and he went 10-7, threw for 4,611 yards, 34tds and 14ints, with a rating of 108.3. Chase had 81 catches, for 1,455 yards and 13td's
Jalen Hurts barely played as a rookie (1-3 as a starter) and in year 2, he went 8-7, for 3,144 yards, 16tds, 9 ints, with a rating of 87.2.
In year 3, they went and got AJ Brown (after spending a high 1st on his buddy Davonta Smith, kind of like Chase/Burrow) and he went 14-1, with 3,701 yards, 22tds, 6 picks and a rating of 101.5. AJ had 88 catches, 1,496 yards and 11tds, while Smith went from a 64-916-5 guy as a rookie to 95-1196-7 with Brown across from him (don't even get me started on the improvement from Miles Sanders).
Tua in his first 2 seasons went 12-8, for 4,500 yards, 27tds, 15ints, and a rating of 87.1 and 90.1.
In year 3, after getting 104-1,015-6 from Waddle (Tua's friend from Bama, anyone else seeing a theme), they went out and put Tyreek across from him. Tua goes 8-5, throws for 3,548, 25tds, 8ints, and a rating of 105.5 when he got hurt. Tyreek finished with 119 catches, 1,710 yards and 7tds, while Waddle went for 75-1356-8tds.
Young QB's need help around them. I've done this analysis around here more times than I can count. Shit, veteran QB's need help too. Look at Rodgers last year when he lost Adams. Look at frigging Geno Smith when he got DK Metcalf and Tyler Lockett on the same field. Look at, oh, any QB in San Francisco, right down to Mr. Irrelevant, when you give them weapons everywhere.
This is the new model in the NFL.
Mac Jones was better as a rookie than any of these guys, and the Pats lost his OC, the offensive line was shit, his best receiver (IMO) in Bourne was benched, Hunter Henry can't block and isn't a weapon, Agholor sucks balls, Jonnu sucks balls, the rookie 2nd rounder got hurt....And you end up with last season.
Go get Mac's buddy from Alabama if there are any left there...