P: Transform/Resize is constrained by default - Want ability to go back to legacy behavior

I know... it's nuts!

It's actually 'broken' surely? If you tap the un-link icon, it should be un-linked? But that icon now does nothing at all!
P.S. Who thought this was a good idea?

Apple introduced natural scroll in touchpad but provided an option to switch to classic scroll. That’s how you introduce new conventions. People are used to shift key transform and for some it’s hard and unnecessary to break the habit. Like mine. I feel like I am forced to like the opinion of UX designers at Adobe.

Couldn't agree more, this is frustrating the hell out of me. Something I do 100 times a day has changed for no reason.

I hate this new feature. I've used Shift+drag to constrain proportion on an object for 20 years and it's habit.  And every other program sill requires you to hold shift to constrain. Change it back Photoshop, and let the people who like this new feature can enable it.

Hopefully you're all still annoyed at this, but there's a working temporary fix here - https://www.reddit.com/r/Design/comments/9sfqg2/frustrated_with_the_new_photoshop_cc_2019/

Not good enough. Illogical change which has clearly bewildered a lot of those who have updated.

YES! This is so unintuitive!! 

Also, it makes no sense to constrain proportions when I'm dragging by one of the side/edge handles (not the corners). If I'm dragging on only one axis, my default behavior should be to only scale along that axis!

In that case, you might write it up as a feature request. Ask them to move support for the Photography Plan software over to their main support for bug reporting.  Explain why you think it's better so they can understand what you don't like about this forum for reporting bugs.