For real? lolWell you guys know that Kaio-Ken is stronger than any class transformation in DBZ.
Since you can increase its level how much you want but problem is that body can't handle it.
That is why in terms of power and speed, kaioken should be better and if kaioken is nerfed like that, no one will use it.
In my eyes, it should be like this:
Kaioken lvl 1 - HP and EP drain with 3% power and speed increase
Kaioken lvl2 - Less HP and EP drain with 6% power and speed increase
Kaioken lvl3 - EP drain with 10% power and speed increase.
Kaioken shouldn't increase critic dmg and critic rates, just base dmg and speed.
And with less drains it would be really good for many classes such as DW and Majin Chef, they would get power they need.