@Daze623 Nah, the stim damage heals back instantly, and is easily ignored. I played a lot of Octane. He's OP as it gets, right next to Horizon. He's one of the strongest solo fraggers. His pad is too strong of an engagement tool.
Again, movement speed is everything. In every game. Ever. People like to sleep on that, but joke heroes like Wattson, Bangalore, etc., being on the same cast as Octane and Horizon shows that the dude in charge of balancing this game is sniffing the Overwatch glue.