I think you should stop adding features for a while and concentrate on fixing the memory issues. Amethyst (and Onyx) both crash so frequently that it is a constant struggle to use. 

If you insist on adding new features, at least start with audio notifications for DMs. 

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 What do you mean by audio notifications? We do have notifications with the usual audio as others apps do.. 🤔 

 crashes for me are fine now, maybe update from github? 

 I just get the notification badge (dot) informing me of a new DM but no audio associated with it.  

 Are you using the Play version? Do you get notifications on android's system tray?  

 I do get notifications on Android's system tray but I don't use the Play version. I'm using F-Droid through Obtainium.  

 You can choose the Play version via Obtainium as well. The Play version has notifications in the tray, the f droid version just have that in-app notifications without audio.