Par4QC was correct on the stiffer flex for longer shaft length.
I had X flex in 47"-48" drivers. Had them in DCT, db455, Cleveland TL 310, BOM FAS
The first one took me almost a season and many, many buckets of range balls to get the tempo tuned in.
I'd say comparing to my regular driver length of 45"-45 1/2" the longer length needs to pay attention to "going through" the golf ball , release aggressively with full extension. A longer length of shaft naturally flattens the swing plane.
Depending on your golf swing, you'll need to find the bottom of the swing arc again and position it right behind the golf ball so it'll be on an up-plane at contact.
I also like a higher loft, instead of the conventional 4° - 6° loft, I did the best with 8.5° - 9.5° because I didn't have a high swing speed. At best before my injury, I was barely 103-105 MPH swinging out of my shoes.
My longest carry was around 280'ish on the average. Can't swing the 47"-48" any longer so was the long irons.
My left arm and shoulder will never be the same.
Give it time to find the grooves. Not as difficult to play the longer driver as some had assumed. As long as you have the swing speed to match.
I have a friend whom could swing a long driver ( think it was 47" ) with 97 MPH driver swing speed. Of course he has a softer shaft in his driver and he put it out there regularly at over 265.