Feedback -
The Heroes system is very good at the moment, you can really get the fighting style you want. I only play Warden, but you can see and feel that the Conquerer has very strong attacks and defence, that the Orochi has very fast attacks, etc.. It isn't like some other games where you could have a fast character but he wasn't very fast or he could still Tank.
Suggestions -
The only suggestion I have is nerfing the requested characters. Nerfing the Orochi attacks or the Raider throws would help balanced the game and prevent one Hero from dominating the others.
Have you tried dodging his rush/throw? So I personally like the raider the most but Ive noticed that it can be hard to grab another hero with it sometimes and I feel like dodging to the side would be an easy way to evade it(Refering specifically to the rush). And as for the throw(when youre next to the other hero and throw them off the side) all the heros can do it. The other thing to consider is that the raiders throw is one of his main character traits, the warden can land his second hit, the conqueror has a super good block, etc. So if the raiders throw was nerfed then what would make him unique?
I'm not saying the Raiders throw and the Orochi attacks are unblockable or unavoidable. I'm just saying that although each class has their own strength and weakenesses, their ability are so far from average they should be nerfed. These 2 classes can be beaten as well as any other classes, but their abilities are so far from the norme there are not a lot of skills required, just luck or random bashing.
Let's say the average is 1. The Kensei may be 1.6 in speed and the Conquerer 1.7 in defence. But the Orochi attack speed would be like 2,4 and the raiders throw distance 2.9. This is way too far from the average attack speed or throw distance. That's why it should be nerfed.