Half of the sharingan techniques are pulled out of a** and they all make it seem like everything what the others' have and worked for are like s**t. Lets give some examples:
-You can be a genjutsu master, but lulz: sharingan fodderizes you in an instant
-Lee worked too much time to gain his speed and taijutsu techniques in part 1, but whoop-de-freakin-doo: a sharingan using brat is reaching his speed in 1 month, even though he can not maintain his speed as much as Lee, it was still an a**pull
-Susanoo: the ultimate party-killer in Naruto, having an ultimate defense is somehow related to your eyeball
Izanami: You explained it, it is the "defeat the opponent definetely no jutsu"
Izanagi: I think one of your eyes is not a big cost compared to your life
Of course it will have powers, but those are just eyes people, eyes...They do not have to have gazillions of op techniques.