Does iOS allow changing the 'default' app for anything ? I deleted the stock mail app as well but I typically don't send new mail from my phone so it hasn't been a big deal for me (yet). I do read mail and will occasionally reply from my phone but that's all.
I don't think so. Hopefully that comes eventually but I'm not holding my breath. The most frustrating example of this for me is Apple Music and my Chevy's infotainment system. I blame both Apple and GM for this problem.
I subscribe to Microsoft's Groove Music and don't use iTunes/Apple Music at all anymore. I use bluetooth audio from my phone or XM radio 95% of the time when I'm driving and this works perfectly. If I plug my iPhone in because I want to use the maps on my car's touch screen or my phone just needs to be charged the car immediately opens up Apple Music and starts playing my iTunes library in alphabetical order.
This happens even when I had Pocket Casts open playing a podcast or Groove music playing before I plugged in the USB. I can grab my phone and switch back to Pocket Casts or Groove Music to get the audio I want but the car's screen keeps displaying the song that was playing in iTunes. If I want the display to work correctly I have to use Bluetooth and my car doesn't give me the option to do that when my phone is plugged in via USB.
As if this wasn't annoying enough, it always starts playing the same song when I plug my phone in. It just happens to be a song I don't like very much with lots of profanity that was part of an album I bought over 10 years ago. If I have co-workers in my car with me and we need to use the GPS it's always a race to change the audio before it gets embarrassing.
I have tried deleting the Apple Music app from my phone completely because I don't use it at all. The problem is that when I do this my car doesn't recognize my phone as an audio device when it is plugged in via USB anymore. There doesn't seem to be any way to remove songs I own from my iTunes library either. I can delete them from my devices but then it just streams the audio.
Heh, and just today I changed the 'poll' or fetch time to (15) minutes. It still refreshes when I open the app to show new messages though. Unless those messages happened to come in in the past (14) minutes after I checked (15) minutes ago (in a perfect scenario !), it doesn't appear to be working right.
Hmm... The fetch every 15 minutes setting always seemed to work for me. I guess I never tried timing it but it was never noticeably slow for me.