I'm actually for this change. There have been times when I'm chasing bombs just outside my range for accurate blindfiring, but there's too much **** (bombers, usually, or fighters, or **** behind bombs) for me to use reticle targeting properly, and me frantically spamming B has me targeting bombs 10 clicks away. That just gets frustrating.
Targeting bombers and bombs by the order they are created may have been a dev decision to prioritize bombers that are assumed to be closer to their targets. Most retail missions have bombers warping in at a set distance from your escort, so the system actually worked and made sense, since longer-lived bombers and bombers would almost always be closer to their targets. However, this does limit bomber-heavy mods that don't always put your bombers at a consistent distance away.
Come to think of it, how useful do you guys think "target bombs sorted by time-left-until-impact" would be?