I'll start this with the caveat that we have not played a real minute yet under the Perry/Christie regime, but I have a sneaking suspicion we've just been getting all talk this off-season. They can say all the right things in a presser about being a defensive-focused organization, build an identity, we're going to fight every game etc.... and we come out the 1st game with the exact same problems as last year, allow 54% from 3 and -10 3PM on the night.
I'm no NBA coach and I won't pretend to even come close to understanding the intricacies of how to run a professional organization, but my god how was this not the first thing addressed this off-season and training camp? How do you watch a year of being the worst 3pt defense in basketball and literally the first game has those same exact problems? And people can keep pretending it's all personal; there's significantly worse teams with far worse talent that don't get shot out of the building night in and night out.
Like you said, I'll gladly accept open lay-ups every so often if that means we're not leaving uncontested 3's the entire game. Step 1 to fixing the defense SHOULD have been "Hey guys, we are not going to be 30th in 3pt defense this year."