@Manoj_reddy , I am sorry, what you have posted is Google Now/Pixel Launcher Settings Screen. This is not our Launcher Settings Screen.
The actual problem is , Google App becomes sluggish over time due to the extended cache , bringing the Google app down to base version shall clear the cache which will make the app faster.(This is an obvious engineering workaround) As the google now screen is tightly integrated with our Launcher, it is eventually affects the Launcher stability as well. You are free to experiment with Google App as it can be directly updated from play store any time, if in case you want the latest version after bringing it down to the Base version.
If you are facing any other problem with our launcher(in case you use it), we are ready to help you out.
Have a Good Day!.