Yep, I believe it's a software change that happened a few months ago. I also need to use my brakes more and I don't drive harder. I also know it's not from the recent colder days as it's been like this the whole summer. Since it's a software change, the car is within parameters and there's nothing the tech can do.
its definitely weaker than before, and doesnt have anything to do with those who still have the ability to change it in normal firmware in the older model 3s (like mine).
Service tech visited......told me cannot compare MYLR to M3LR because different vehicles, different motors and battery etc What a crock!! He decided regen was normal before driving, then confirmed normal. So regen is reduced, having to use brakes more, don't know if this is software change but seems likely.
I dont know if I would say "what a crock" because its true that they are different vehicles and we cant really compare them for this feature. With that being said, its definitely SIGNIFICANTLY different between the two vehicles. My wife has a Model Y performance, and I have a model 3 performance, and if driven back to back when both cars have been sitting in the garage (and are at the same 70% charge level I keep them at when parked at home), its extremely noticeable.
I am not "up in arms" about it, but will admit to being disappointed. I dont use 1 pedal driving, but do use roll mode and like regular regen, not reduced regen.
/shrug...
When I bought my model 3 and accepted that they were going to push updates to it almost constantly, I mentally accepted that there were going to be times that they were going to do something I didnt like, as well. There have been a lot of changes I have been really happy with, features added, etc, and I am really (really) happy that, for the most part, people buying now dont have a bunch of features I am missing.
So, I am resigned to sometimes getting things I dont like as well, and this happens to be one of those things.