There are some serious ux issues with the app and the content delivered from Sky Sports Now in my opinion. The fact that its effectively just delivering the same satellite stream to the app but at a lower quality is one, the TV guide is poor and stuttery on both an Nvidia Shield and my 2023 TCL c845 and doesn't smoothly scroll across times now (they almost need to look the cursor to the TV guide window until the back button is pressed to avoid the +- 2 hour approach), replays are not posted quickly especially the EPL, took well over 12 hours to get a man utd reply up after it had played. Finally the streams in the tv guide sometimes don't reflect where they would be normally. Watched the F1 on reply and going back in time, the qualifying started 7 minutes in to Q1 rather than at the beginning of the Quali show and the actual race started on the formation lap rather than at the F1 intro like it should be.
Sky have a long way to go to match the quality of Spark Sports streams and app but I don't think Sky know anything but linear streaming approaches given the improvements made don't make any changes to the underlying approach.