Locket of the Iron Solari changes

It recently got nerf by 5 MR on the aura, it's actually not that bad, until you realize Spirit Visage and Banshees give 60 MR which is way better than 35. This means Locket of the Iron Solari doesn't have a lot going for it, I get that Riot and some pro players dislike auras, fine, but how about some compensation to put it back in competition with the other two.

I suggest making Locket of the Iron Solari have 20% CDR, it's fine if the cost goes up, but as it stands the difference in MR is just too massive that it makes it really not worth it to build it for anyone but maybe a Leona who wants Sun related items. The shield is cool and all but it doesn't make up for 25 MR and (potentially) 50 hp.

One increases healing One is very defensive and One is for helping allies, but they're all built for the same purpose right? To fight against Magic Damage, but Locket of the Iron Solari just doesn't do that very well at all currently.

If we can't have 20% CDR can we at least have some more magic resist on the item for the one who builds it?