I'd LOVE the capacity to set preferences on following. For example, if you're already following 1000+ people - really? Good for you. I haven't the time to give the appropriate attention to 10 people let alone 1000's. Love to automatically block followers who follow more than 100 people.
Next? Set preferences to who can respond / comment. If you're not in my follower family. Sorry.
Finally - I'd like to screen who follows. Lately I've a spate of what I assume are spam accounts. All very young women. All - zero posts / comments. All brand-spanking new to Medium.Com.