is the angle of approach changes for most tee shots, and some holes feel really different than before moving back to these tees. Now I find myself clicking on the distance marker, just to see the new angle where my ball will land (assuming a straight shot). Some hole's approach angle have changed drastically from the 2nd tee back to the 3rd tee back.
Yes it does, I believe it is mainly due to hitting a larger club with a different trajectory. Your FW shots change this way also due to having a longer approach to green and hitting a larger club than your used to.
My understanding of what they are saying seems to differ to what others think.
The angles of par 3's and approaches aren't really affected as, outwith adjusting for wind, they are straight lines. You may choose not to aim at the pin but that's a separate issue.
Where the angle of shot changes is from the tee as the tee shot is often not played on the straight line between the tee and pin. I think BB 1 and PB 1 are good examples of this, less distance will change the angle of the tee shot considerably.
Sorry if this is wrong,