How to uninstall 15.1

There are many changes within iPadOS15.

With iPadOS15, you are now able to freely position widgets amongst Apps on any of the Home Screens.

Widgets placed on a Home Screen now individually occupy one or more elements of a 4x6 icon grid. Home Screens without Widgets retain the familiar 5x6 icon grid. The slide-over Today View, previously seen in Portrait screen orientation from the first Home Screen, is still present - and is now also seen in Landscape. However, the revised slide-over Today view does not incorporate the Time and Time panel.

More information about the new Widgets can be found here:

Use widgets on your iPad - Apple Support

The iPad User Guide is also a rich source of information - and is especially useful in becoming familiar with the many changes and new features introduced in iPadOS15. The Guide is available both online using a web browser (such as Safari), or as an Apple Books download:

iPad User Guide - Apple Support

https://books.apple.com/book/id1567104892

Apple do invite constructive feedback, comments and feature requests via their product feedback pages. For iPad and iPadOS:

Feedback - iPad - Apple

I upgraded to iOS 15.1 on my iPad Pro and my iPhone XR. Now the xfinity app for my home alarm system will not load. What do I do to correct this problem? I have already deleted the app and rebooted and reinstalled the app.

Having updated to iPadOS 15.1, you cannot now return to an earlier version of iPadOS.

Contact xfinity to have them update their app to work with iOS 15.1