It is a weak design. Torque probably caused the issue from the factory on those who had cracks on delivery. Others may see that they developed over time, like mine. It would probably be wise to retorque them to be safe and use the zip ties to reinforce the area. After making repairs on mine, it's very solid. The arms have very little to no torque on them now. I had lots of torque from the factory and I think movement over time caused my issues. I only hand catch. I see it's happening on the rear arms. If torque from the factory is the issue, then why not all the arms? Aren't most of you seeing the rear arms cracking?
I went ahead and zip tied mine with opaque white zip ties I have out in the shop. I figured why not, more support the better. I think after my fix, it stronger than factory now and will probably last me the life of the drone. When shells become available, I'll put one back for just in case.
So I made the choice on mine. I repaired it. But I won't forget when it comes to buy future products. I thought I wouldn't be an early adopter. And you would think on a third generation, these issues would be moot, but here we are.