Page up/down in guide view

FireTV Xfinity Stream app: Using the channel guide. 

In this forum, there are comments from a couple of years ago about no Page UP / Page Down in the guide view. Has this ever been addressed? 

In the Live TV guide on FireTV, pressing the channel up or down buttons jump a page at a time. But not so in the Xfinity Stream app. One channel at a time! Seems an easy fix and would make a lot of people very happy. 

Also, there is no way to 'favorite,' a channel in the app.