Bruh, in a few months luffy learned everything Ace and Sabo knows for his 5 years trainning...
And also Sabo being close to Ace is stupid. You also said that this will not be similar to the canon, and yet Sabo will still be a revolutionary.
the crush was kinda lame. hes over 30 mentally. Well hes been training for 12 years or so so I hope hes got atleast advanced or higher haki proficiency and a strong body