The fingerprints of your device do not exist in the stock driver, they only exist in the Mc driver.
Your device had to be paired with the stock driver in the automatic migration as a generic device, so you cannot perform a manual driver change from the Mc driver to the stock driver.
Changes to reporting intervals reduce battery usage.
All my devices with CR2450 batteries last a minimum of 7 or 8 months and those that use CR2 last more than a year.
For the change in the reporting configuration to be accepted by the device, you must wake it up at the time of sending the configuration and on some devices it must be in pairing mode.
This link describes a method to reinstall the device and configure it with custom intervals without having to lose the routines