Am I the only one who believes that certain items with magic resist values seem a bit underwhelming?
For example 
Aegis/Locket only have 20 mr when a 
+25?
But 
Warden's mail gets 45 armor when the combine cost of both 
is 30...
Items such as 
seem to have proper mr values based on the item composition.
So why you didn't complain about loss in Health Regen too... It didn't gave Regen on it's base stats... And in similar case you can complaint about Zeke too... (I was thinking like this when first played too... then I realized the Aura affects user too...)
So the answer is... because you forgot 20 MR and Regen from Legion Aura... so 20+20=40 MR...
Magic damage is supposed to be harder to counter than Physical. If they made MR easier to obtain, the effect would be lost.
Am I the only one who believes that certain items with magic resist values seem a bit underwhelming?
No. LoL is played by millions of people, that's statistically impossible to be the only one.
For example
Locket and Aegis offer 20 MR + a 20 MR aura.
Just as 2 + 2 = 4; 20 + 20 = 40.
Locket gives 40 MR.
But
40 from 25 is a 60% increase. 45 from 30 is a 50% increase.
Items such as
Locket and Aegis give 40 MR.
