Have you checked to see what the Swing-Weight of your re-shafted irons are ????
I would think if they are C8 to D4 , you're just fine !!
Swing-Weight is grossly mis-understood, the idea is to make all your irons feel & thus swing to feel.
I think it was Sam Snead, he could tell when 1 of his clubs was just 1 swing weight out of sync with the rest of his set.. There were & are many golfers who can tell [feel] the difference !!