As someone who likes to know what exactly is going on with the applications running on my devices, a list of changes made by an update is very important to me.
A search for change logs for Spotify, especially for the Android platform, seems to send me to multiple places in the community pages and they all have logs that are several years old. Nothing about the most recent update that I just loaded on my phone.
While I understand that to gather this information manually can be time consuming, there are plenty of tools available that would link into your source control and generate this information for you. Then a simple link that to that from the Play Store page or even better as part of the about box should be simple to do.