revert kassadin's R but without dmg

i played kassadin when his R had double the current range, and it was really fun i can understand why people dont think giving him his range back would think its unfair but... he doesnt need to have dmg on his R it does damage but its not used for it because the main point of playing kassadin is his mobility, most of the time when i notice that im using his ultimate only to do dmg, its to clear a few minnions before recalling. and his ult doesnt need dmg for him to be balanced either, many champion have ultimates that deal 0 dmg but grant mobility like or 's R, i think kassadin should be a champion based entirely about him being a low risk low reward assassin unlike others that are either high risk high reward or low risk high reward. it would allow him to be pratically unkillable post 6 but not broken in any way since he would not have as much dmg as other champion, twisted fate can never 1 shot you yet he is still played because he turn 2v2 into 2v3, and even if tf hurt like a support, him being here still does a lot.

i dont like talon and him being able to 1 shot you AND have that much mobility shouldnt happen, but kassadin; 3 ability that hurt and an ult that just move you around, would be way more fair and way more fun.