It's certainly an interesting idea, given that many social media platforms have something similar. It's just another way to make Steemit that much easier to use, especially if, perhaps, you are leaning away from the drama you find on other platforms and ease into this one. It will now have at least perhaps "familiar" post functions so the crossover is easier to slide into. And I highly doubt it'll have an effect on featured author posts, mainly because the turnover of posts and reblogs will likely be in such high rotation that not everyone may see such posts, even the second or third time around.... so featured author posts can still come in handy to allow a post to really stand out, and even enhance the probability of reblogging.