I'm fine with this. Steemit.com is just like any other Steem interface that is free to iterate content discovery specific to their platform.
Not overlooking the fact that Steemit.com still remains the top steem interface, however, there is a non-zero chance that this will change. Some people like the UI of busy.org or UX of steempeak and so will not get this featured post show up on their feed.
I do agree that @steem.marketing needs to be careful with what posts gets featured and as you said, "not to overdo it"