What's broken in Glance on Windows 10 Mobile? The built in Glance screen already supports background images, so the separate app isn't as necessary any more.
The built in function doesn't have identical features (I think in the old app the glance BG could be different to your lock screen), but it works on my 950 without problems.
I remember trying out that lock screen app on my 1020 and it was a horrible experience with poor performance. If they brought it back it would need to perform as well as the vanilla, OOTB lock screen.
To the OP, could you not get an app on your phone that uses the SensorCore API to track your steps and then updates the Glance screen to show the updated value periodically?