Few suggestions to improve the game

1. I play with no sound, but I'm not aware of 'noisy daily feat notifications'.  I cannot comment either way as I don't understand the issue.
2. It would be good I guess, but with Galatic Challenges gone, I don't think necessary.  I think coding this would be a very, very big job with no return in improved finances.  That with EA today, is impossible.  EA are asking them to do the exact opposite to this (only work on things that bring in a direct income).
3. I guess, yes.  I'm in the same boat as you.  However, we're probably the ones doing it incorrectly.
4.  My issue with this is: the more saved teams, the less time you save and the less point of using this feature.  I tend to use it for teams where I could mistake a character.  Fulcrum vs CAT springs to mind.
5. I know I'm in the minority, but I absolutely despised Galactic Challenges.  It was and is my least favourite game mode.  If...they introduced the feat counter you suggested in 2...then I'd be more inclined to hate it less.  However, bring back a dead game mode and spending a lot of finances trying to add No. 2 to their spaghetti coding...ain't gonna happen.  

I think for CG do add anything the first question is "What's in it for them?"   Is adding any of these going to increase purchases significantly?  I'd say no.   Is not adding any of these going to mean players will leave?  I'd also say no.  You could argue that players left because of GC being taken down, but that's done.  Nobody extra is going to leave because it isn't brought back.