i think they are worst defensively for sure but I also think they would be better offensively with Brady this year compare to last year.
"would be better this year compared to last year"
I'm just not remotely close to seeing what you are seeing.
Tight Ends
This topic has been beaten to death in multiple threads, but let's compare the 2020 TEs to the 2019 group.
2020 Ranking - 2019 Ranking
1.) Ryan Izzo -------- Ben Watson
2.) Dalton Keene ---- Matt LaCosse
3.) TBD (zero stats) -- Ryan Izzo
The Pats have gone from bad to atrocious at Tight End. On Monday night they will probably be using an undrafted defensive lineman at the position, who played some TE in college (17 receptions in four years). The position has produced ten receptions for 122 yards and zero TD in seven games. It's never a good thing when your #3 option on a bad unit is elevated to starter.
Wide Receiver
Another topic that has been the wrath of armchair GMs this season - but rightfully so.
2020 Ranking --- 2019 Ranking
(Slot) Isaiah Ford -- Julian Edelman
1.) Damiere Byrd -- Phillip Dorsett
2.) N'Keal Harry --- Josh Gordon
3.) Jakobi Meyers - Mohammed Sanu
4.) Isaiah Zuber --- Jakobi Meyers
5.) Gunner Olszewski - N'Keal Harry
And another position that has gone from bad to atrocious. How can this group possibly be considered to be an improvement over 2019?
Running Backs
Damien Harris and JJ Taylor are definitely positives for the 2020 group, but that is offset by lower productivity this season from Sony Michel and James White. Since the topic is about how much better off the 2020 Pats would be with Brady, then we really should adjust for Newton's rushing numbers; Cam leads the Pats in rushing yards and has run for six of the Pats ten rushing touchdowns. Overall I would say the unit is about the same, perhaps slightly better.
From 2019 to 2020 the Patriots have deteriorated at DL, LB, S, WR, TE and K - with little or no improvement at the other non-QB positions. It is not realistic to believe this would continue to be a 12 win team if only Tom Brady was still in Foxborough.