User blog comment:Emptylord/Class Reworks - Itemization Follow-up/@comment-4022742-20160512083756/@comment-4022742-20160512182044

Alistar can't keep the ardent censer buff up like he can now, with for instance tower pushes where the waves get cleared fast enough for him to refresh it.

Taric has the leash right now he can go full melee and still heal is allies and give the buff, since ardent would be based on the area around taric, if he heals his carry the buff doesnt get transferred.

Face of the mountain, Janna and Lulu can apply the shield from range and give the boost to their ally.

Locket of the iron Solari and Karma can apply this buff in a far range on multiple allies.

For the champions and skills that already made great use of this it's not just a small nerf. Especially if the trade off is that everyone and their mother can use it. Then you will get even more mages that don't really have utility in the bot lane because now they can get heals trough an item.