I don’t think people wanted a lens that could be more capable if it makes the average users photos worse. I’m not a professional, despite knowing my way around flaring from using this phone.
The iPhone 11 was given the award of the best phone camera of 2019 by MKBHD or Marques Brownlee, and he also did the blind camera comparison between 16 phones, where the iPhone lost round one, and Note 10 won overall. I think these tests are showing us what the average non pro user wants in their camera.
I think the cause of these flaring issues on the 11 series of iPhones is caused by reducing the camera “bump” from previous years and exposing the lens more without putting it further down into the device. The actual sensor and lens that they chose from Sony isn’t the issue with this phone, it’s Apples design. Unfortunately many people don’t realize Apple doesn’t make the camera sensors.