While some people like using the Today page on the Home Screen, Lock screen, and in Notification Center, others don’t. It really comes down to whether or not you actually use any of your Today widgets.
If you find yourself missing the simplicity of the iOS 9 Spotlight page because you don’t use any Today widgets, then a new free jailbreak tweak called Spotlife by iOS developer pxcex could be a beneficial addition to your device.