The featured connections at the bottom of profiles aren't new, they've been there as long as I've been on wikitree and appear on every profile that's connected to the main tree. They change each week depending on theme.
Its up to you if you find it interesting or relevant, but I don't see it taking away from the seriousness of profiles. One of wikitree's great strengths is focusing on how we are all connected. I always enjoy looking at the featured connections each week, I find it gives me a good sense of which lines on my tree are well connected, and it's a chance to learn something new and interesting