The only time I've seen them appear healthy are when a 
comes flying out the jungle for a gank. Other than that, extremely broken.
Malzahar = refreshes every 6 seconds late game
Yasuo = activates from running/dashing around a few seconds or using his ult
They're up too much, and are too effective (especially with Yasuo having windwall).
you forgot to mention how early game that passive on malz is a 30 Cd ( mages ramp up like ADC's )
and how yasuos shield is less then riven but also has a long cooldown because you have to move to use
Malz kinda needs something late game to keep him safe what with having 0 mobility moves in his kit. You get mobility or you get stats/safety. If you don't have either of those you just tend to die a lot without contributing much. Before anyone says "But Ult!?" Remember he has to STOP MOVING entirely to do that. So if he ults thats the time to punish him, and don't do it by having your entire team try to dump everything at the exact same moment.
Passive shields are underestimated in this game, its part of why hexdrinker is so strong. You never have to think about them, they just save you even when you don't realize it.
