I have a 59 rhino, tried out 51-56 pvp, and got almost positive without rushes, kd was like 180-200. I usually have 2:1 kd on each character, so i know what in doing. The point is, rhinos are definately underpowered, even in ctf. Sure there buffs are strong, but even if youre str, you die easily. Plus, rhinos have no dmg besides there tornado