When adding default crossfades on multiple cuts, it would be great if Premiere left the crossfades (different from the default) already set.
Avid works like that sincer ever.
Jim Simon commented
What if you WANTED to change the already existing transitions?
I think the current behavior is correct. The software should do what you tell it, not assume anything. If you select a transition, it gets changed. if you don't want it changed, don't select it.