If your opponent has Detention Sphere, they can remove your Oblivion Ring with it, but they couldnt remove your Detention Sphere, so Detention Sphere is both better and worse in ways that generally seem to balance out
And its great for Wizards short-term profits (this is not exactly a pro, as it doesnt benefit anybody but Wizards and their stockholders)
A prebuilt, lower power Constructed deck is going to be a more approachable starting point for most than jumping in at the deep end with Commander
but to the Narset player, it gives a full grip
It even offers modality as a double Regrowth of sorts, which is an awesome buyout when you're not using the first mode
Also, if you attack multiple opponents, you get to tap and goad a creature for each player you attack