I just did a 2E to 2F transfer on Delta/AF a week ago today. My flight landed at M gate so we had to deplane via stairs onto the tarmac. There are shuttle buses waiting if this is where your plane parks.
I was in Economy Comfort seated at the front. It was 15 minutes before I was out on the top step. From there it was 1h5m of steady walking (not running) to get to my gate.
Keep watching for the 2F signs instead of the Correspondence signs. The biggest traffic jam was as The bus unloaded there was a big crowd trying to go thru Immigration for exiting in Paris. Stay to the right then as soon as you pass the door for that you’ll see the sign for the corridor to go to 2F which will be on the left.
The security to enter 2F was very quick and efficient. As you come up thru the line, make sure you’ve got your pockets empty, belt and jacket off, water bottle empty. Shoes stay on. 3-1-1 liquids bag comes out as do electronics bigger than a phone (tablet/Kindle/laptop). The security guy in my lane had ziplock bags in his hand and was making people use them if their liquids were in something other than your standard ziplock.
Passport control after security was very quick and easy. I was directed to the egates where the attendant took my passport and said “let me put this in for you, the machine is touchy.” Zip.Zap. Mask down. Passport stamped and I was on my way.
I made 1 quick comfort stop.
My particular AF flight to Milan started boarding 9 minutes early. I am guessing the only reason we didn’t take off early was they had an assigned time slot.
I found the process fairly easy, it’s just a longish was from 2E to 2F! I’d transit thru CDG again BUT I’d want a minimum of 2 hours for comfort. You can do it in 90 minutes, you just need to be ready to move and not stop until you get through passport control and up the escalator to the gate area.