Automatic tags can help people understand they exist and also help folks who aren’t as savvy as you think up tags to put into their articles! But noted that a granular option to get rid of them if you don’t ever want them would be nice.
Here’s some info about collections for you:
We’re working on improving them (this is just the first iteration) so yes: we’re with you on future customization possibilities.
For reading stuff from people you follow, that should always appear in your feed. If you feel like you are missing out on stuff, let me know what so perhaps we can look into it. You follow a semi-decent chunk of people, so if a lot of them are very active, you might be inundated with writing (a good problem to have, depending on how you look at it).