Over the years sharingan's and also few other ninja's value has been reducing. For example at first even the normal sharingan was considered dangerous but people are fighting mankegyou capably. Kakashi seems to be very weak now. And third raikage seems stronger than pain. Tsunade has used the ultimate seal and became stronger than third raikage, then why didn't she use it against pain.
wrong. kakashi is holding his own against the bijuus.
wrong third raikage has only more brute strength and speed. nagato is much fearsome than him
wrong that's only brute strength.
they mean notning while comparing the doujutsu's power.
and right now we only see the most powerful guys of course they'll hold their own against the doujutsus. all those guys are in the top 50 alive ninja
edit: I made some terrible mistakes at first, but they should be OK now.