After reevaluating the function I have discovered something. I was wrong and the original action was actually a swipe to the right. I forget the specific reason why this was reversed but I remember reading it somewhere. This was easier in general for the right handed majority as your thumb is already almost fully extended mid screen and poised to make the left to right swipe. Now you have to extend it backward (right) and then back to the middle where it was in most apps (mail, messages), then back to the right to hit "delete", then finally back to it's resting place in the center of the screen requiring 4 motions instead of the original 2 - one swift swipe to the right-delete, then back to the resting position.
If you think I'm being anal, I'm not. I'm just being technical and specific. On a small scale these may seem like nitpicks/minutiae, but when these are actions performed dozens of times a day it becomes very noticeable and tedious when for years it was quick and efficient.