Sorry, I forgot to specifically answer you about user feeds, too:
Your public profile page can also show your activity as well, like which games you've played, scores you submitted, the castle you built today, etc.
We'll have filtering in place so you can pick and choose (to some degree) which pieces of information you want to see (or not), who's activity you see (or not), things like that.
@MrDayCee, If you have more questions about how the activity feeds may work, please start a new thread for it so we stay on topic here.