The positive aspect is not promoting paid mods, the sole existence of which is a detriment to the modding community as a whole.
It is very much about whether the Nexus is better. If it was possible to post a "Bard's College Expansion patch collection" with an auto-installing FOMOD on Bethesda.net, people would for sure do it. I would argue it would be even more convenient for the users because the patches would be on the same platform as the mod itself. But because Bethesda.net does not support this they want to post it on Nexus instead and then cry when the Nexus doesn't allow it.
Bethesda invented the problem, called Verified Creations. Nexus is just trying to be a part of the solution instead. Paid mods, no matter the form they come in, are a cancer. Not terminal yet, but the more it grows the worse it gets.