i think its fair, heres why;
if you used a shotgun that can 1 hit kill, it would have 1 clip and you would only have one secondary weapon left to shoot with. this means even if you dont use the shotgun you are only able to fight 1v1's with 1 secondary weapon and therefore lose alot of them unless you choose to use it on that 1v1 and if its the last person alive after you used the shotgun on other enemies leaving you with no choice.
as for the nade; its the same concept, but this time you have to give up an item slot which can be used for meds/whatever, and alot of health/ap. not to mention you have to be somewhat smart to know when to throw it and where to, as you only have one chance and the hp/ap u lost from rings is lost regardless if you hit or not.
also, dont be brainded and know that if the enemy has 1 hit kills watch for them in strategic times the enemy might use them.
